diff --git a/api/go/gosdn/networkelement/networkelement.pb.go b/api/go/gosdn/networkelement/networkelement.pb.go
index 51cdb0ca7ca994a3fdb35e55e1f070cee0ced70b..60220e8f7e75534d8acbdcdd7ac1edc54f7aa1f5 100644
--- a/api/go/gosdn/networkelement/networkelement.pb.go
+++ b/api/go/gosdn/networkelement/networkelement.pb.go
@@ -7,6 +7,7 @@
 package networkelement
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/pnd"
 	southbound "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/southbound"
 	transport "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/transport"
@@ -81,10 +82,11 @@ type NetworkElement struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id               string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Name             string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
-	Model            string `protobuf:"bytes,3,opt,name=model,proto3" json:"model,omitempty"`
-	TransportAddress string `protobuf:"bytes,4,opt,name=transport_address,json=transportAddress,proto3" json:"transport_address,omitempty"`
+	Id               string             `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name             string             `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Model            string             `protobuf:"bytes,3,opt,name=model,proto3" json:"model,omitempty"`
+	TransportAddress string             `protobuf:"bytes,4,opt,name=transport_address,json=transportAddress,proto3" json:"transport_address,omitempty"`
+	Metadata         *conflict.Metadata `protobuf:"bytes,5,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (x *NetworkElement) Reset() {
@@ -147,6 +149,13 @@ func (x *NetworkElement) GetTransportAddress() string {
 	return ""
 }
 
+func (x *NetworkElement) GetMetadata() *conflict.Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
 type AddNetworkElementConfiguration struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -809,12 +818,14 @@ var file_gosdn_networkelement_networkelement_proto_rawDesc = []byte{
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 }
 
 var (
@@ -999,34 +1013,36 @@ var file_gosdn_networkelement_networkelement_proto_goTypes = []interface{}{
 	(*UpdateNetworkElementResponse)(nil),   // 10: gosdn.networkelement.UpdateNetworkElementResponse
 	(*DeleteNetworkElementRequest)(nil),    // 11: gosdn.networkelement.DeleteNetworkElementRequest
 	(*DeleteNetworkElementResponse)(nil),   // 12: gosdn.networkelement.DeleteNetworkElementResponse
-	(*southbound.SouthboundInterface)(nil), // 13: gosdn.southbound.SouthboundInterface
-	(*transport.TransportOption)(nil),      // 14: gosdn.transport.TransportOption
+	(*conflict.Metadata)(nil),              // 13: gosdn.conflict.Metadata
+	(*southbound.SouthboundInterface)(nil), // 14: gosdn.southbound.SouthboundInterface
+	(*transport.TransportOption)(nil),      // 15: gosdn.transport.TransportOption
 }
 var file_gosdn_networkelement_networkelement_proto_depIdxs = []int32{
-	13, // 0: gosdn.networkelement.AddNetworkElementConfiguration.sbi:type_name -> gosdn.southbound.SouthboundInterface
-	14, // 1: gosdn.networkelement.AddNetworkElementConfiguration.transport_option:type_name -> gosdn.transport.TransportOption
-	2,  // 2: gosdn.networkelement.AddNetworkElementRequest.network_element:type_name -> gosdn.networkelement.AddNetworkElementConfiguration
-	0,  // 3: gosdn.networkelement.AddNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
-	0,  // 4: gosdn.networkelement.GetNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
-	1,  // 5: gosdn.networkelement.GetNetworkElementResponse.network_element:type_name -> gosdn.networkelement.NetworkElement
-	0,  // 6: gosdn.networkelement.GetAllNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
-	1,  // 7: gosdn.networkelement.GetAllNetworkElementResponse.network_element:type_name -> gosdn.networkelement.NetworkElement
-	1,  // 8: gosdn.networkelement.UpdateNetworkElementRequest.network_element:type_name -> gosdn.networkelement.NetworkElement
-	0,  // 9: gosdn.networkelement.UpdateNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
-	0,  // 10: gosdn.networkelement.DeleteNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
-	3,  // 11: gosdn.networkelement.NetworkElementService.Add:input_type -> gosdn.networkelement.AddNetworkElementRequest
-	5,  // 12: gosdn.networkelement.NetworkElementService.Get:input_type -> gosdn.networkelement.GetNetworkElementRequest
-	7,  // 13: gosdn.networkelement.NetworkElementService.GetAll:input_type -> gosdn.networkelement.GetAllNetworkElementRequest
-	9,  // 14: gosdn.networkelement.NetworkElementService.Update:input_type -> gosdn.networkelement.UpdateNetworkElementRequest
-	4,  // 15: gosdn.networkelement.NetworkElementService.Add:output_type -> gosdn.networkelement.AddNetworkElementResponse
-	6,  // 16: gosdn.networkelement.NetworkElementService.Get:output_type -> gosdn.networkelement.GetNetworkElementResponse
-	8,  // 17: gosdn.networkelement.NetworkElementService.GetAll:output_type -> gosdn.networkelement.GetAllNetworkElementResponse
-	10, // 18: gosdn.networkelement.NetworkElementService.Update:output_type -> gosdn.networkelement.UpdateNetworkElementResponse
-	15, // [15:19] is the sub-list for method output_type
-	11, // [11:15] is the sub-list for method input_type
-	11, // [11:11] is the sub-list for extension type_name
-	11, // [11:11] is the sub-list for extension extendee
-	0,  // [0:11] is the sub-list for field type_name
+	13, // 0: gosdn.networkelement.NetworkElement.metadata:type_name -> gosdn.conflict.Metadata
+	14, // 1: gosdn.networkelement.AddNetworkElementConfiguration.sbi:type_name -> gosdn.southbound.SouthboundInterface
+	15, // 2: gosdn.networkelement.AddNetworkElementConfiguration.transport_option:type_name -> gosdn.transport.TransportOption
+	2,  // 3: gosdn.networkelement.AddNetworkElementRequest.network_element:type_name -> gosdn.networkelement.AddNetworkElementConfiguration
+	0,  // 4: gosdn.networkelement.AddNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
+	0,  // 5: gosdn.networkelement.GetNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
+	1,  // 6: gosdn.networkelement.GetNetworkElementResponse.network_element:type_name -> gosdn.networkelement.NetworkElement
+	0,  // 7: gosdn.networkelement.GetAllNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
+	1,  // 8: gosdn.networkelement.GetAllNetworkElementResponse.network_element:type_name -> gosdn.networkelement.NetworkElement
+	1,  // 9: gosdn.networkelement.UpdateNetworkElementRequest.network_element:type_name -> gosdn.networkelement.NetworkElement
+	0,  // 10: gosdn.networkelement.UpdateNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
+	0,  // 11: gosdn.networkelement.DeleteNetworkElementResponse.status:type_name -> gosdn.networkelement.Status
+	3,  // 12: gosdn.networkelement.NetworkElementService.Add:input_type -> gosdn.networkelement.AddNetworkElementRequest
+	5,  // 13: gosdn.networkelement.NetworkElementService.Get:input_type -> gosdn.networkelement.GetNetworkElementRequest
+	7,  // 14: gosdn.networkelement.NetworkElementService.GetAll:input_type -> gosdn.networkelement.GetAllNetworkElementRequest
+	9,  // 15: gosdn.networkelement.NetworkElementService.Update:input_type -> gosdn.networkelement.UpdateNetworkElementRequest
+	4,  // 16: gosdn.networkelement.NetworkElementService.Add:output_type -> gosdn.networkelement.AddNetworkElementResponse
+	6,  // 17: gosdn.networkelement.NetworkElementService.Get:output_type -> gosdn.networkelement.GetNetworkElementResponse
+	8,  // 18: gosdn.networkelement.NetworkElementService.GetAll:output_type -> gosdn.networkelement.GetAllNetworkElementResponse
+	10, // 19: gosdn.networkelement.NetworkElementService.Update:output_type -> gosdn.networkelement.UpdateNetworkElementResponse
+	16, // [16:20] is the sub-list for method output_type
+	12, // [12:16] is the sub-list for method input_type
+	12, // [12:12] is the sub-list for extension type_name
+	12, // [12:12] is the sub-list for extension extendee
+	0,  // [0:12] is the sub-list for field type_name
 }
 
 func init() { file_gosdn_networkelement_networkelement_proto_init() }
diff --git a/api/go/gosdn/topology/link.pb.go b/api/go/gosdn/topology/link.pb.go
index a6ccea7d9d76de9798d2f27d4c5548b430d0b33b..bcdc9f5e80172268ec5d187407ecf5b0079a1499 100644
--- a/api/go/gosdn/topology/link.pb.go
+++ b/api/go/gosdn/topology/link.pb.go
@@ -7,6 +7,7 @@
 package topology
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -28,12 +29,13 @@ type Link struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id         string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Name       string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
-	SourceNode *Node  `protobuf:"bytes,3,opt,name=sourceNode,proto3" json:"sourceNode,omitempty"`
-	TargetNode *Node  `protobuf:"bytes,4,opt,name=targetNode,proto3" json:"targetNode,omitempty"`
-	SourcePort *Port  `protobuf:"bytes,5,opt,name=sourcePort,proto3" json:"sourcePort,omitempty"`
-	TargetPort *Port  `protobuf:"bytes,6,opt,name=targetPort,proto3" json:"targetPort,omitempty"`
+	Id         string             `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name       string             `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	SourceNode *Node              `protobuf:"bytes,3,opt,name=sourceNode,proto3" json:"sourceNode,omitempty"`
+	TargetNode *Node              `protobuf:"bytes,4,opt,name=targetNode,proto3" json:"targetNode,omitempty"`
+	SourcePort *Port              `protobuf:"bytes,5,opt,name=sourcePort,proto3" json:"sourcePort,omitempty"`
+	TargetPort *Port              `protobuf:"bytes,6,opt,name=targetPort,proto3" json:"targetPort,omitempty"`
+	Metadata   *conflict.Metadata `protobuf:"bytes,7,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (x *Link) Reset() {
@@ -110,6 +112,13 @@ func (x *Link) GetTargetPort() *Port {
 	return nil
 }
 
+func (x *Link) GetMetadata() *conflict.Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
 var File_gosdn_topology_link_proto protoreflect.FileDescriptor
 
 var file_gosdn_topology_link_proto_rawDesc = []byte{
@@ -122,31 +131,36 @@ var file_gosdn_topology_link_proto_rawDesc = []byte{
 	0x69, 0x70, 0x74, 0x6f, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x2e, 0x70, 0x72, 0x6f,
 	0x74, 0x6f, 0x63, 0x2d, 0x67, 0x65, 0x6e, 0x2d, 0x6f, 0x70, 0x65, 0x6e, 0x61, 0x70, 0x69, 0x76,
 	0x32, 0x2f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61,
-	0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x19, 0x67, 0x6f, 0x73,
-	0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2f, 0x6e, 0x6f, 0x64, 0x65,
-	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x19, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f,
-	0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2f, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x22, 0x82, 0x02, 0x0a, 0x04, 0x4c, 0x69, 0x6e, 0x6b, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64,
-	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61,
-	0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x34,
-	0x0a, 0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x4e, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01,
-	0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f, 0x6c,
-	0x6f, 0x67, 0x79, 0x2e, 0x4e, 0x6f, 0x64, 0x65, 0x52, 0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65,
-	0x4e, 0x6f, 0x64, 0x65, 0x12, 0x34, 0x0a, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x4e, 0x6f,
-	0x64, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e,
-	0x2e, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x4e, 0x6f, 0x64, 0x65, 0x52, 0x0a,
-	0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x4e, 0x6f, 0x64, 0x65, 0x12, 0x34, 0x0a, 0x0a, 0x73, 0x6f,
-	0x75, 0x72, 0x63, 0x65, 0x50, 0x6f, 0x72, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14,
-	0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2e,
-	0x50, 0x6f, 0x72, 0x74, 0x52, 0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x50, 0x6f, 0x72, 0x74,
-	0x12, 0x34, 0x0a, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x50, 0x6f, 0x72, 0x74, 0x18, 0x06,
-	0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70,
-	0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x50, 0x6f, 0x72, 0x74, 0x52, 0x0a, 0x74, 0x61, 0x72, 0x67,
-	0x65, 0x74, 0x50, 0x6f, 0x72, 0x74, 0x42, 0x34, 0x5a, 0x32, 0x63, 0x6f, 0x64, 0x65, 0x2e, 0x66,
-	0x62, 0x69, 0x2e, 0x68, 0x2d, 0x64, 0x61, 0x2e, 0x64, 0x65, 0x2f, 0x64, 0x61, 0x6e, 0x65, 0x74,
-	0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x6f,
-	0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1d, 0x67, 0x6f, 0x73,
+	0x64, 0x6e, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x6c, 0x69, 0x63, 0x74, 0x2f, 0x63, 0x6f, 0x6e, 0x66,
+	0x6c, 0x69, 0x63, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x19, 0x67, 0x6f, 0x73, 0x64,
+	0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2f, 0x6e, 0x6f, 0x64, 0x65, 0x2e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x19, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70,
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+	0x22, 0xb8, 0x02, 0x0a, 0x04, 0x4c, 0x69, 0x6e, 0x6b, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d,
+	0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x34, 0x0a,
+	0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x4e, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28,
+	0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f,
+	0x67, 0x79, 0x2e, 0x4e, 0x6f, 0x64, 0x65, 0x52, 0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x4e,
+	0x6f, 0x64, 0x65, 0x12, 0x34, 0x0a, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x4e, 0x6f, 0x64,
+	0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e,
+	0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x4e, 0x6f, 0x64, 0x65, 0x52, 0x0a, 0x74,
+	0x61, 0x72, 0x67, 0x65, 0x74, 0x4e, 0x6f, 0x64, 0x65, 0x12, 0x34, 0x0a, 0x0a, 0x73, 0x6f, 0x75,
+	0x72, 0x63, 0x65, 0x50, 0x6f, 0x72, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e,
+	0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x50,
+	0x6f, 0x72, 0x74, 0x52, 0x0a, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x50, 0x6f, 0x72, 0x74, 0x12,
+	0x34, 0x0a, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x50, 0x6f, 0x72, 0x74, 0x18, 0x06, 0x20,
+	0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f,
+	0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x50, 0x6f, 0x72, 0x74, 0x52, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65,
+	0x74, 0x50, 0x6f, 0x72, 0x74, 0x12, 0x34, 0x0a, 0x08, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74,
+	0x61, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x18, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e,
+	0x63, 0x6f, 0x6e, 0x66, 0x6c, 0x69, 0x63, 0x74, 0x2e, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74,
+	0x61, 0x52, 0x08, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x42, 0x34, 0x5a, 0x32, 0x63,
+	0x6f, 0x64, 0x65, 0x2e, 0x66, 0x62, 0x69, 0x2e, 0x68, 0x2d, 0x64, 0x61, 0x2e, 0x64, 0x65, 0x2f,
+	0x64, 0x61, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70, 0x69, 0x2f,
+	0x67, 0x6f, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67,
+	0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -163,20 +177,22 @@ func file_gosdn_topology_link_proto_rawDescGZIP() []byte {
 
 var file_gosdn_topology_link_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
 var file_gosdn_topology_link_proto_goTypes = []interface{}{
-	(*Link)(nil), // 0: gosdn.topology.Link
-	(*Node)(nil), // 1: gosdn.topology.Node
-	(*Port)(nil), // 2: gosdn.topology.Port
+	(*Link)(nil),              // 0: gosdn.topology.Link
+	(*Node)(nil),              // 1: gosdn.topology.Node
+	(*Port)(nil),              // 2: gosdn.topology.Port
+	(*conflict.Metadata)(nil), // 3: gosdn.conflict.Metadata
 }
 var file_gosdn_topology_link_proto_depIdxs = []int32{
 	1, // 0: gosdn.topology.Link.sourceNode:type_name -> gosdn.topology.Node
 	1, // 1: gosdn.topology.Link.targetNode:type_name -> gosdn.topology.Node
 	2, // 2: gosdn.topology.Link.sourcePort:type_name -> gosdn.topology.Port
 	2, // 3: gosdn.topology.Link.targetPort:type_name -> gosdn.topology.Port
-	4, // [4:4] is the sub-list for method output_type
-	4, // [4:4] is the sub-list for method input_type
-	4, // [4:4] is the sub-list for extension type_name
-	4, // [4:4] is the sub-list for extension extendee
-	0, // [0:4] is the sub-list for field type_name
+	3, // 4: gosdn.topology.Link.metadata:type_name -> gosdn.conflict.Metadata
+	5, // [5:5] is the sub-list for method output_type
+	5, // [5:5] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
 }
 
 func init() { file_gosdn_topology_link_proto_init() }
diff --git a/api/go/gosdn/topology/node.pb.go b/api/go/gosdn/topology/node.pb.go
index b24ecce2e4d1e47314008fb302435a5d48af6533..13832a7bcf9c0615afb69533538d24b907ef2c53 100644
--- a/api/go/gosdn/topology/node.pb.go
+++ b/api/go/gosdn/topology/node.pb.go
@@ -7,6 +7,7 @@
 package topology
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -23,66 +24,20 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-type Metadata struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	ResourceVersion int64 `protobuf:"varint,1,opt,name=resourceVersion,proto3" json:"resourceVersion,omitempty"`
-}
-
-func (x *Metadata) Reset() {
-	*x = Metadata{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_gosdn_topology_node_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *Metadata) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*Metadata) ProtoMessage() {}
-
-func (x *Metadata) ProtoReflect() protoreflect.Message {
-	mi := &file_gosdn_topology_node_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use Metadata.ProtoReflect.Descriptor instead.
-func (*Metadata) Descriptor() ([]byte, []int) {
-	return file_gosdn_topology_node_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *Metadata) GetResourceVersion() int64 {
-	if x != nil {
-		return x.ResourceVersion
-	}
-	return 0
-}
-
 type Node struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id   string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Name string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Id       string             `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name     string             `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Metadata *conflict.Metadata `protobuf:"bytes,3,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (x *Node) Reset() {
 	*x = Node{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_gosdn_topology_node_proto_msgTypes[1]
+		mi := &file_gosdn_topology_node_proto_msgTypes[0]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -95,7 +50,7 @@ func (x *Node) String() string {
 func (*Node) ProtoMessage() {}
 
 func (x *Node) ProtoReflect() protoreflect.Message {
-	mi := &file_gosdn_topology_node_proto_msgTypes[1]
+	mi := &file_gosdn_topology_node_proto_msgTypes[0]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -108,7 +63,7 @@ func (x *Node) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Node.ProtoReflect.Descriptor instead.
 func (*Node) Descriptor() ([]byte, []int) {
-	return file_gosdn_topology_node_proto_rawDescGZIP(), []int{1}
+	return file_gosdn_topology_node_proto_rawDescGZIP(), []int{0}
 }
 
 func (x *Node) GetId() string {
@@ -125,6 +80,13 @@ func (x *Node) GetName() string {
 	return ""
 }
 
+func (x *Node) GetMetadata() *conflict.Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
 var File_gosdn_topology_node_proto protoreflect.FileDescriptor
 
 var file_gosdn_topology_node_proto_rawDesc = []byte{
@@ -137,17 +99,19 @@ var file_gosdn_topology_node_proto_rawDesc = []byte{
 	0x69, 0x70, 0x74, 0x6f, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x2e, 0x70, 0x72, 0x6f,
 	0x74, 0x6f, 0x63, 0x2d, 0x67, 0x65, 0x6e, 0x2d, 0x6f, 0x70, 0x65, 0x6e, 0x61, 0x70, 0x69, 0x76,
 	0x32, 0x2f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61,
-	0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x34, 0x0a, 0x08, 0x4d,
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-	0x52, 0x0f, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f,
-	0x6e, 0x22, 0x2a, 0x0a, 0x04, 0x4e, 0x6f, 0x64, 0x65, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18,
-	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d,
-	0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x42, 0x34, 0x5a,
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-	0x65, 0x2f, 0x64, 0x61, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70,
-	0x69, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c,
-	0x6f, 0x67, 0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1d, 0x67, 0x6f, 0x73,
+	0x64, 0x6e, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x6c, 0x69, 0x63, 0x74, 0x2f, 0x63, 0x6f, 0x6e, 0x66,
+	0x6c, 0x69, 0x63, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x60, 0x0a, 0x04, 0x4e, 0x6f,
+	0x64, 0x65, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02,
+	0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09,
+	0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x34, 0x0a, 0x08, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61,
+	0x74, 0x61, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x18, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e,
+	0x2e, 0x63, 0x6f, 0x6e, 0x66, 0x6c, 0x69, 0x63, 0x74, 0x2e, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61,
+	0x74, 0x61, 0x52, 0x08, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x42, 0x34, 0x5a, 0x32,
+	0x63, 0x6f, 0x64, 0x65, 0x2e, 0x66, 0x62, 0x69, 0x2e, 0x68, 0x2d, 0x64, 0x61, 0x2e, 0x64, 0x65,
+	0x2f, 0x64, 0x61, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70, 0x69,
+	0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f,
+	0x67, 0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -162,17 +126,18 @@ func file_gosdn_topology_node_proto_rawDescGZIP() []byte {
 	return file_gosdn_topology_node_proto_rawDescData
 }
 
-var file_gosdn_topology_node_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_gosdn_topology_node_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
 var file_gosdn_topology_node_proto_goTypes = []interface{}{
-	(*Metadata)(nil), // 0: gosdn.topology.Metadata
-	(*Node)(nil),     // 1: gosdn.topology.Node
+	(*Node)(nil),              // 0: gosdn.topology.Node
+	(*conflict.Metadata)(nil), // 1: gosdn.conflict.Metadata
 }
 var file_gosdn_topology_node_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	1, // 0: gosdn.topology.Node.metadata:type_name -> gosdn.conflict.Metadata
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_gosdn_topology_node_proto_init() }
@@ -182,18 +147,6 @@ func file_gosdn_topology_node_proto_init() {
 	}
 	if !protoimpl.UnsafeEnabled {
 		file_gosdn_topology_node_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Metadata); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_gosdn_topology_node_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Node); i {
 			case 0:
 				return &v.state
@@ -212,7 +165,7 @@ func file_gosdn_topology_node_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_gosdn_topology_node_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   1,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/api/go/gosdn/topology/port.pb.go b/api/go/gosdn/topology/port.pb.go
index 2f80df787591483a23117187bdf41992dbee030b..7d5b7af460ae1c51a6491970d08b45f90670e5ab 100644
--- a/api/go/gosdn/topology/port.pb.go
+++ b/api/go/gosdn/topology/port.pb.go
@@ -7,6 +7,7 @@
 package topology
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -83,9 +84,10 @@ type Port struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id            string         `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Name          string         `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
-	Configuration *Configuration `protobuf:"bytes,3,opt,name=configuration,proto3" json:"configuration,omitempty"`
+	Id            string             `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name          string             `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Configuration *Configuration     `protobuf:"bytes,3,opt,name=configuration,proto3" json:"configuration,omitempty"`
+	Metadata      *conflict.Metadata `protobuf:"bytes,4,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (x *Port) Reset() {
@@ -141,6 +143,13 @@ func (x *Port) GetConfiguration() *Configuration {
 	return nil
 }
 
+func (x *Port) GetMetadata() *conflict.Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
 var File_gosdn_topology_port_proto protoreflect.FileDescriptor
 
 var file_gosdn_topology_port_proto_rawDesc = []byte{
@@ -153,22 +162,28 @@ var file_gosdn_topology_port_proto_rawDesc = []byte{
 	0x69, 0x70, 0x74, 0x6f, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x2e, 0x70, 0x72, 0x6f,
 	0x74, 0x6f, 0x63, 0x2d, 0x67, 0x65, 0x6e, 0x2d, 0x6f, 0x70, 0x65, 0x6e, 0x61, 0x70, 0x69, 0x76,
 	0x32, 0x2f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61,
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+	0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1d, 0x67, 0x6f, 0x73,
+	0x64, 0x6e, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x6c, 0x69, 0x63, 0x74, 0x2f, 0x63, 0x6f, 0x6e, 0x66,
+	0x6c, 0x69, 0x63, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x43, 0x0a, 0x0d, 0x43, 0x6f,
+	0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x0e, 0x0a, 0x02, 0x69,
+	0x70, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x70, 0x12, 0x22, 0x0a, 0x0c, 0x70,
+	0x72, 0x65, 0x66, 0x69, 0x78, 0x4c, 0x65, 0x6e, 0x67, 0x74, 0x68, 0x18, 0x02, 0x20, 0x01, 0x28,
+	0x03, 0x52, 0x0c, 0x70, 0x72, 0x65, 0x66, 0x69, 0x78, 0x4c, 0x65, 0x6e, 0x67, 0x74, 0x68, 0x22,
+	0xa5, 0x01, 0x0a, 0x04, 0x50, 0x6f, 0x72, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01,
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 	0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x43, 0x0a, 0x0d,
 	0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x03, 0x20,
 	0x01, 0x28, 0x0b, 0x32, 0x1d, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x74, 0x6f, 0x70, 0x6f,
 	0x6c, 0x6f, 0x67, 0x79, 0x2e, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69,
 	0x6f, 0x6e, 0x52, 0x0d, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f,
-	0x6e, 0x42, 0x34, 0x5a, 0x32, 0x63, 0x6f, 0x64, 0x65, 0x2e, 0x66, 0x62, 0x69, 0x2e, 0x68, 0x2d,
-	0x64, 0x61, 0x2e, 0x64, 0x65, 0x2f, 0x64, 0x61, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x6f, 0x73, 0x64,
-	0x6e, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74,
-	0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x6e, 0x12, 0x34, 0x0a, 0x08, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x18, 0x04, 0x20,
+	0x01, 0x28, 0x0b, 0x32, 0x18, 0x2e, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2e, 0x63, 0x6f, 0x6e, 0x66,
+	0x6c, 0x69, 0x63, 0x74, 0x2e, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x08, 0x6d,
+	0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x42, 0x34, 0x5a, 0x32, 0x63, 0x6f, 0x64, 0x65, 0x2e,
+	0x66, 0x62, 0x69, 0x2e, 0x68, 0x2d, 0x64, 0x61, 0x2e, 0x64, 0x65, 0x2f, 0x64, 0x61, 0x6e, 0x65,
+	0x74, 0x2f, 0x67, 0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x67, 0x6f, 0x2f, 0x67,
+	0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -185,16 +200,18 @@ func file_gosdn_topology_port_proto_rawDescGZIP() []byte {
 
 var file_gosdn_topology_port_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
 var file_gosdn_topology_port_proto_goTypes = []interface{}{
-	(*Configuration)(nil), // 0: gosdn.topology.Configuration
-	(*Port)(nil),          // 1: gosdn.topology.Port
+	(*Configuration)(nil),     // 0: gosdn.topology.Configuration
+	(*Port)(nil),              // 1: gosdn.topology.Port
+	(*conflict.Metadata)(nil), // 2: gosdn.conflict.Metadata
 }
 var file_gosdn_topology_port_proto_depIdxs = []int32{
 	0, // 0: gosdn.topology.Port.configuration:type_name -> gosdn.topology.Configuration
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+	2, // 1: gosdn.topology.Port.metadata:type_name -> gosdn.conflict.Metadata
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
 }
 
 func init() { file_gosdn_topology_port_proto_init() }
diff --git a/api/go/gosdn/topology/route.pb.go b/api/go/gosdn/topology/route.pb.go
index 41718efe21bbc296a74dadbe13ff04ab1a38fa41..d2ed3ecb7d2815765c908ca923d298d598a6dc3f 100644
--- a/api/go/gosdn/topology/route.pb.go
+++ b/api/go/gosdn/topology/route.pb.go
@@ -7,6 +7,7 @@
 package topology
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -107,9 +108,10 @@ type RoutingTable struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id     string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	NodeID string   `protobuf:"bytes,2,opt,name=nodeID,proto3" json:"nodeID,omitempty"`
-	Routes []*Route `protobuf:"bytes,3,rep,name=routes,proto3" json:"routes,omitempty"`
+	Id       string             `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	NodeID   string             `protobuf:"bytes,2,opt,name=nodeID,proto3" json:"nodeID,omitempty"`
+	Routes   []*Route           `protobuf:"bytes,3,rep,name=routes,proto3" json:"routes,omitempty"`
+	Metadata *conflict.Metadata `protobuf:"bytes,4,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (x *RoutingTable) Reset() {
@@ -165,6 +167,13 @@ func (x *RoutingTable) GetRoutes() []*Route {
 	return nil
 }
 
+func (x *RoutingTable) GetMetadata() *conflict.Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
 var File_gosdn_topology_route_proto protoreflect.FileDescriptor
 
 var file_gosdn_topology_route_proto_rawDesc = []byte{
@@ -177,26 +186,32 @@ var file_gosdn_topology_route_proto_rawDesc = []byte{
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 }
 
 var (
@@ -213,16 +228,18 @@ func file_gosdn_topology_route_proto_rawDescGZIP() []byte {
 
 var file_gosdn_topology_route_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
 var file_gosdn_topology_route_proto_goTypes = []interface{}{
-	(*Route)(nil),        // 0: gosdn.topology.Route
-	(*RoutingTable)(nil), // 1: gosdn.topology.RoutingTable
+	(*Route)(nil),             // 0: gosdn.topology.Route
+	(*RoutingTable)(nil),      // 1: gosdn.topology.RoutingTable
+	(*conflict.Metadata)(nil), // 2: gosdn.conflict.Metadata
 }
 var file_gosdn_topology_route_proto_depIdxs = []int32{
 	0, // 0: gosdn.topology.RoutingTable.routes:type_name -> gosdn.topology.Route
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+	2, // 1: gosdn.topology.RoutingTable.metadata:type_name -> gosdn.conflict.Metadata
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
 }
 
 func init() { file_gosdn_topology_route_proto_init() }
diff --git a/api/go/gosdn/topology/routingTable.pb.go b/api/go/gosdn/topology/routingTable.pb.go
index e230789f7bb6960cc6a048ee00239830ee6101b1..87fc85763020b361a87a627cd40106b9431b7ae4 100644
--- a/api/go/gosdn/topology/routingTable.pb.go
+++ b/api/go/gosdn/topology/routingTable.pb.go
@@ -7,6 +7,7 @@
 package topology
 
 import (
+	_ "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -369,73 +370,75 @@ var file_gosdn_topology_routingTable_proto_rawDesc = []byte{
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+	0x6f, 0x73, 0x64, 0x6e, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x6f, 0x73, 0x64,
+	0x6e, 0x2f, 0x74, 0x6f, 0x70, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
 }
 
 var (
diff --git a/api/openapiv2/gosdn_northbound.swagger.json b/api/openapiv2/gosdn_northbound.swagger.json
index 7732e02a12841b8fe2961ac65d566017e288ab05..a4d6d049a28aa2012dd08b0dcfc727e0c5aef970 100644
--- a/api/openapiv2/gosdn_northbound.swagger.json
+++ b/api/openapiv2/gosdn_northbound.swagger.json
@@ -1750,6 +1750,15 @@
         }
       }
     },
+    "conflictMetadata": {
+      "type": "object",
+      "properties": {
+        "resourceVersion": {
+          "type": "string",
+          "format": "int64"
+        }
+      }
+    },
     "coreCreatePndListRequest": {
       "type": "object",
       "properties": {
@@ -2921,15 +2930,6 @@
       ],
       "default": "STATUS_UNSPECIFIED"
     },
-    "gosdnconflictMetadata": {
-      "type": "object",
-      "properties": {
-        "resourceVersion": {
-          "type": "string",
-          "format": "int64"
-        }
-      }
-    },
     "gosdncoreStatus": {
       "type": "string",
       "enum": [
@@ -3222,6 +3222,9 @@
         },
         "transportAddress": {
           "type": "string"
+        },
+        "metadata": {
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
@@ -3948,7 +3951,7 @@
           "type": "string"
         },
         "metadata": {
-          "$ref": "#/definitions/gosdnconflictMetadata"
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
@@ -4088,6 +4091,9 @@
         },
         "targetPort": {
           "$ref": "#/definitions/topologyPort"
+        },
+        "metadata": {
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
@@ -4099,6 +4105,9 @@
         },
         "name": {
           "type": "string"
+        },
+        "metadata": {
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
@@ -4113,6 +4122,9 @@
         },
         "configuration": {
           "$ref": "#/definitions/gosdntopologyConfiguration"
+        },
+        "metadata": {
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
@@ -4150,6 +4162,9 @@
           "items": {
             "$ref": "#/definitions/topologyRoute"
           }
+        },
+        "metadata": {
+          "$ref": "#/definitions/conflictMetadata"
         }
       }
     },
diff --git a/api/proto/buf.lock b/api/proto/buf.lock
index dbc02de2fba97b76f486b10b966958fce3a6c42f..e5d1311d723ba10d971038beaedc65d90aa8035c 100644
--- a/api/proto/buf.lock
+++ b/api/proto/buf.lock
@@ -8,4 +8,4 @@ deps:
   - remote: buf.build
     owner: grpc-ecosystem
     repository: grpc-gateway
-    commit: bc28b723cd774c32b6fbc77621518765
+    commit: b96615cde70c403f8075c48e56178f88
diff --git a/api/proto/gosdn/networkelement/networkelement.proto b/api/proto/gosdn/networkelement/networkelement.proto
index 6885b8b587e2458d2fac53b0cc5660ad683d592f..ad75044ab0a86221a3759bfe5269b7aba6a0d119 100644
--- a/api/proto/gosdn/networkelement/networkelement.proto
+++ b/api/proto/gosdn/networkelement/networkelement.proto
@@ -7,6 +7,7 @@ import "google/protobuf/descriptor.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 import "github.com/openconfig/gnmi/proto/gnmi/gnmi.proto";
 
+import "gosdn/conflict/conflict.proto";
 import "gosdn/pnd/pnd.proto";
 import "gosdn/transport/transport.proto";
 import "gosdn/southbound/southbound.proto";
@@ -59,6 +60,7 @@ message NetworkElement {
     string name = 2;
     string model = 3;
     string transport_address = 4;
+    conflict.Metadata metadata = 5;
 }
 
 message AddNetworkElementConfiguration {
diff --git a/api/proto/gosdn/topology/link.proto b/api/proto/gosdn/topology/link.proto
index 70aee027733179856e95c9fc92c51670126d51fe..07a1ba9213eca20dddc6a7be77a4b6573baf7919 100644
--- a/api/proto/gosdn/topology/link.proto
+++ b/api/proto/gosdn/topology/link.proto
@@ -6,6 +6,7 @@ import "google/api/annotations.proto";
 import "google/protobuf/descriptor.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 
+import "gosdn/conflict/conflict.proto";
 import "gosdn/topology/node.proto";
 import "gosdn/topology/port.proto";
 
@@ -18,4 +19,5 @@ message Link {
     Node targetNode = 4;
     Port sourcePort = 5;
     Port targetPort = 6;
+    conflict.Metadata metadata = 7;
 }
diff --git a/api/proto/gosdn/topology/node.proto b/api/proto/gosdn/topology/node.proto
index e6ac7e2702f2863a9a0ca18e0ce26734a0a5d00a..2e827b19b6dbf7b32a18b2c51be29db64fe32387 100644
--- a/api/proto/gosdn/topology/node.proto
+++ b/api/proto/gosdn/topology/node.proto
@@ -6,14 +6,12 @@ import "google/api/annotations.proto";
 import "google/protobuf/descriptor.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 
+import "gosdn/conflict/conflict.proto";
 
 option go_package = "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/topology";
 
-message Metadata {
-    int64 resourceVersion = 1;
-}
-
 message Node {
     string id = 1;
     string name = 2;
+    conflict.Metadata metadata = 3;
 }
diff --git a/api/proto/gosdn/topology/port.proto b/api/proto/gosdn/topology/port.proto
index a7f623a1e899d7c237f4d2fbffc97dc0deb4bcc5..a8a4cccd47b4902fb668ee6a4719ba24a93a29a8 100644
--- a/api/proto/gosdn/topology/port.proto
+++ b/api/proto/gosdn/topology/port.proto
@@ -6,6 +6,7 @@ import "google/api/annotations.proto";
 import "google/protobuf/descriptor.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 
+import "gosdn/conflict/conflict.proto";
 
 option go_package = "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/topology";
 
@@ -18,4 +19,5 @@ message Port {
     string id = 1;
     string name = 2;
     Configuration configuration = 3;
+    conflict.Metadata metadata = 4;
 }
diff --git a/api/proto/gosdn/topology/route.proto b/api/proto/gosdn/topology/route.proto
index 7e95c093989cae36243f73ca042aaeecc0a33d51..a895810698547fde407ee2c28dc7fd99f2b0a91e 100644
--- a/api/proto/gosdn/topology/route.proto
+++ b/api/proto/gosdn/topology/route.proto
@@ -6,6 +6,7 @@ import "google/api/annotations.proto";
 import "google/protobuf/descriptor.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 
+import "gosdn/conflict/conflict.proto";
 
 option go_package = "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/topology";
 
@@ -21,4 +22,5 @@ message RoutingTable {
     string id = 1;
     string nodeID = 2;
     repeated Route routes = 3;
+    conflict.Metadata metadata = 4;
 }
diff --git a/api/proto/gosdn/topology/routingTable.proto b/api/proto/gosdn/topology/routingTable.proto
index ab8d2fbc7abb37435c79a477290e473540930ce7..8d982e81659defae0f6de07e45f246c519592ccf 100644
--- a/api/proto/gosdn/topology/routingTable.proto
+++ b/api/proto/gosdn/topology/routingTable.proto
@@ -8,6 +8,7 @@ import "protoc-gen-openapiv2/options/annotations.proto";
 
 import "gosdn/topology/route.proto";
 import "gosdn/topology/topology.proto";
+import "gosdn/conflict/conflict.proto";
 
 option go_package = "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/topology";
 
diff --git a/controller/api/initialise_test.go b/controller/api/initialise_test.go
index 1fed5009d856d4e883b5834a5a57791ef25b841b..9ec8959c03bd5a6feb7083a7ae6fb8b9c943c586 100644
--- a/controller/api/initialise_test.go
+++ b/controller/api/initialise_test.go
@@ -8,6 +8,7 @@ import (
 
 	"time"
 
+	"code.fbi.h-da.de/danet/gosdn/api/go/gosdn/conflict"
 	cpb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/core"
 	ppb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/pnd"
 	apb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/rbac"
@@ -122,12 +123,13 @@ func bootstrapUnitTest() {
 
 	sbi := &nucleus.OpenConfig{}
 
-	mockDevice := &mocks.Device{}
-	mockDevice.On("SBI").Return(sbi)
-	mockDevice.On("ID").Return(mneUUID)
-	mockDevice.On("GetModel").Return(sbi.Schema().Root)
-	mockDevice.On("Name").Return("openconfig")
-	mockDevice.On("TransportAddress").Return("127.0.0.1:6030")
+	mockNetworkElement := &mocks.NetworkElement{}
+	mockNetworkElement.On("SBI").Return(sbi)
+	mockNetworkElement.On("ID").Return(mneUUID)
+	mockNetworkElement.On("GetModel").Return(sbi.Schema().Root)
+	mockNetworkElement.On("Name").Return("openconfig")
+	mockNetworkElement.On("TransportAddress").Return("127.0.0.1:6030")
+	mockNetworkElement.On("GetMetadata").Return(conflict.Metadata{ResourceVersion: 0})
 
 	mockPnd := mocks.NetworkDomain{}
 	mockPnd.On("ID").Return(pndUUID)
@@ -137,7 +139,7 @@ func bootstrapUnitTest() {
 	mockPnd.On("CommittedChanges").Return([]uuid.UUID{changeUUID})
 	mockPnd.On("GetChange", mock.Anything).Return(mockChange, nil)
 	mockPnd.On("AddNetworkElement", mock.Anything, mock.Anything, mock.Anything).Return(nil, nil)
-	mockPnd.On("GetNetworkElement", mock.Anything).Return(mockDevice, nil)
+	mockPnd.On("GetNetworkElement", mock.Anything).Return(mockNetworkElement, nil)
 	mockPnd.On("Commit", mock.Anything).Return(nil)
 	mockPnd.On("Confirm", mock.Anything).Return(nil)
 	mockPnd.On("NetworkElements").Return([]networkelement.NetworkElement{
diff --git a/controller/interfaces/networkelement/networkElement.go b/controller/interfaces/networkelement/networkElement.go
index 840cf072a82ec6b37438fa12b5945547024dd786..01a81bd66aab660c00431d4b3d08f7a7c70ff9aa 100644
--- a/controller/interfaces/networkelement/networkElement.go
+++ b/controller/interfaces/networkelement/networkElement.go
@@ -1,6 +1,7 @@
 package networkelement
 
 import (
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/southbound"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/transport"
 	"github.com/google/uuid"
@@ -23,6 +24,7 @@ type NetworkElement interface {
 	IsTransportValid() bool
 	GetModelAsString() (string, error)
 	TransportAddress() string
+	GetMetadata() conflict.Metadata
 }
 
 // Details contains details of a network element used by the cSBI mechanism.
@@ -52,4 +54,6 @@ type LoadedNetworkElement struct {
 	// SBI indicates the southbound interface, which is used by this network element as UUID.
 	SBI   string `json:"sbi"`
 	Model string `json:"model,omitempty" bson:"model,omitempty"`
+
+	Metadata conflict.Metadata `json:"metadata" bson:"metadata"`
 }
diff --git a/controller/mocks/Device.go b/controller/mocks/Device.go
deleted file mode 100644
index 0f93f348bb38163cd673c3aba68a3632a80b1fa4..0000000000000000000000000000000000000000
--- a/controller/mocks/Device.go
+++ /dev/null
@@ -1,199 +0,0 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
-
-package mocks
-
-import (
-	southbound "code.fbi.h-da.de/danet/gosdn/controller/interfaces/southbound"
-	mock "github.com/stretchr/testify/mock"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-
-	transport "code.fbi.h-da.de/danet/gosdn/controller/interfaces/transport"
-
-	uuid "github.com/google/uuid"
-
-	ygot "github.com/openconfig/ygot/ygot"
-)
-
-// Device is an autogenerated mock type for the Device type
-type Device struct {
-	mock.Mock
-}
-
-// CreateModelCopy provides a mock function with given fields:
-func (_m *Device) CreateModelCopy() (ygot.ValidatedGoStruct, error) {
-	ret := _m.Called()
-
-	var r0 ygot.ValidatedGoStruct
-	if rf, ok := ret.Get(0).(func() ygot.ValidatedGoStruct); ok {
-		r0 = rf()
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(ygot.ValidatedGoStruct)
-		}
-	}
-
-	var r1 error
-	if rf, ok := ret.Get(1).(func() error); ok {
-		r1 = rf()
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
-// GetModel provides a mock function with given fields:
-func (_m *Device) GetModel() ygot.GoStruct {
-	ret := _m.Called()
-
-	var r0 ygot.GoStruct
-	if rf, ok := ret.Get(0).(func() ygot.GoStruct); ok {
-		r0 = rf()
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(ygot.GoStruct)
-		}
-	}
-
-	return r0
-}
-
-// GetModelAsString provides a mock function with given fields:
-func (_m *Device) GetModelAsString() (string, error) {
-	ret := _m.Called()
-
-	var r0 string
-	if rf, ok := ret.Get(0).(func() string); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Get(0).(string)
-	}
-
-	var r1 error
-	if rf, ok := ret.Get(1).(func() error); ok {
-		r1 = rf()
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
-// ID provides a mock function with given fields:
-func (_m *Device) ID() uuid.UUID {
-	ret := _m.Called()
-
-	var r0 uuid.UUID
-	if rf, ok := ret.Get(0).(func() uuid.UUID); ok {
-		r0 = rf()
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(uuid.UUID)
-		}
-	}
-
-	return r0
-}
-
-// IsTransportValid provides a mock function with given fields:
-func (_m *Device) IsTransportValid() bool {
-	ret := _m.Called()
-
-	var r0 bool
-	if rf, ok := ret.Get(0).(func() bool); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Get(0).(bool)
-	}
-
-	return r0
-}
-
-// Name provides a mock function with given fields:
-func (_m *Device) Name() string {
-	ret := _m.Called()
-
-	var r0 string
-	if rf, ok := ret.Get(0).(func() string); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Get(0).(string)
-	}
-
-	return r0
-}
-
-// ProcessResponse provides a mock function with given fields: _a0
-func (_m *Device) ProcessResponse(_a0 protoreflect.ProtoMessage) error {
-	ret := _m.Called(_a0)
-
-	var r0 error
-	if rf, ok := ret.Get(0).(func(protoreflect.ProtoMessage) error); ok {
-		r0 = rf(_a0)
-	} else {
-		r0 = ret.Error(0)
-	}
-
-	return r0
-}
-
-// SBI provides a mock function with given fields:
-func (_m *Device) SBI() southbound.SouthboundInterface {
-	ret := _m.Called()
-
-	var r0 southbound.SouthboundInterface
-	if rf, ok := ret.Get(0).(func() southbound.SouthboundInterface); ok {
-		r0 = rf()
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(southbound.SouthboundInterface)
-		}
-	}
-
-	return r0
-}
-
-// Transport provides a mock function with given fields:
-func (_m *Device) Transport() transport.Transport {
-	ret := _m.Called()
-
-	var r0 transport.Transport
-	if rf, ok := ret.Get(0).(func() transport.Transport); ok {
-		r0 = rf()
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(transport.Transport)
-		}
-	}
-
-	return r0
-}
-
-// TransportAddress provides a mock function with given fields:
-func (_m *Device) TransportAddress() string {
-	ret := _m.Called()
-
-	var r0 string
-	if rf, ok := ret.Get(0).(func() string); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Get(0).(string)
-	}
-
-	return r0
-}
-
-type mockConstructorTestingTNewDevice interface {
-	mock.TestingT
-	Cleanup(func())
-}
-
-// NewDevice creates a new instance of Device. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
-func NewDevice(t mockConstructorTestingTNewDevice) *Device {
-	mock := &Device{}
-	mock.Mock.Test(t)
-
-	t.Cleanup(func() { mock.AssertExpectations(t) })
-
-	return mock
-}
diff --git a/controller/mocks/NetworkElement.go b/controller/mocks/NetworkElement.go
index ce25e76b28ad19880adc31b9fa5a6cc8bb5be0af..b04f360abfc73784a100e9b18ab0b866930d1352 100644
--- a/controller/mocks/NetworkElement.go
+++ b/controller/mocks/NetworkElement.go
@@ -3,6 +3,7 @@
 package mocks
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	mock "github.com/stretchr/testify/mock"
 
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -44,6 +45,20 @@ func (_m *NetworkElement) CreateModelCopy() (ygot.ValidatedGoStruct, error) {
 	return r0, r1
 }
 
+// GetMetadata provides a mock function with given fields:
+func (_m *NetworkElement) GetMetadata() conflict.Metadata {
+	ret := _m.Called()
+
+	var r0 conflict.Metadata
+	if rf, ok := ret.Get(0).(func() conflict.Metadata); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(conflict.Metadata)
+	}
+
+	return r0
+}
+
 // GetModel provides a mock function with given fields:
 func (_m *NetworkElement) GetModel() ygot.GoStruct {
 	ret := _m.Called()
diff --git a/controller/mocks/Service.go b/controller/mocks/Service.go
index de81b8be67e30949057a4e743a0e243f080b355b..2f08c6f087a3c1f8dd5740b86be0e8a202cc9edb 100644
--- a/controller/mocks/Service.go
+++ b/controller/mocks/Service.go
@@ -32,6 +32,11 @@ func (_m *Service) PublishEvent(topic string, _a1 controllerevent.Event) error {
 	return r0
 }
 
+// Reconnect provides a mock function with given fields:
+func (_m *Service) Reconnect() {
+	_m.Called()
+}
+
 // RetryPublish provides a mock function with given fields: topic, _a1
 func (_m *Service) RetryPublish(topic string, _a1 controllerevent.Event) error {
 	ret := _m.Called(topic, _a1)
diff --git a/controller/mocks/User.go b/controller/mocks/User.go
index 27dd42bcc1ab9e2d6d1b97a27363214204d38c9c..4b6419e2be1773cb1cb099b5945f5b58070bc0cb 100644
--- a/controller/mocks/User.go
+++ b/controller/mocks/User.go
@@ -3,6 +3,7 @@
 package mocks
 
 import (
+	conflict "code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	mock "github.com/stretchr/testify/mock"
 
 	uuid "github.com/google/uuid"
@@ -13,6 +14,20 @@ type User struct {
 	mock.Mock
 }
 
+// GetMetadata provides a mock function with given fields:
+func (_m *User) GetMetadata() conflict.Metadata {
+	ret := _m.Called()
+
+	var r0 conflict.Metadata
+	if rf, ok := ret.Get(0).(func() conflict.Metadata); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(conflict.Metadata)
+	}
+
+	return r0
+}
+
 // GetPassword provides a mock function with given fields:
 func (_m *User) GetPassword() string {
 	ret := _m.Called()
diff --git a/controller/nucleus/databaseNetworkElementStore.go b/controller/nucleus/databaseNetworkElementStore.go
index 5a42a3730bcfa0662d216a05b66703d59ca5461b..2440de405c8a4508d35530e18463d0cee7dbfee8 100644
--- a/controller/nucleus/databaseNetworkElementStore.go
+++ b/controller/nucleus/databaseNetworkElementStore.go
@@ -9,7 +9,9 @@ import (
 	"code.fbi.h-da.de/danet/gosdn/controller/store"
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/mongo/writeconcern"
 
 	"github.com/google/uuid"
 	log "github.com/sirupsen/logrus"
@@ -168,24 +170,69 @@ func (s *DatabaseNetworkElementStore) Update(networkElementToUpdate networkeleme
 		}
 	}()
 
-	update := bson.D{primitive.E{Key: "$set", Value: networkElementToUpdate}}
+	// 1. Start Transaction
+	wcMajority := writeconcern.New(writeconcern.WMajority())
+	wcMajorityCollectionOpts := options.Collection().SetWriteConcern(wcMajority)
+	userCollection := client.Database(database.DatabaseName).Collection(s.storeName, wcMajorityCollectionOpts)
 
-	upsert := false
-	after := options.After
-	opt := options.FindOneAndUpdateOptions{
-		Upsert:         &upsert,
-		ReturnDocument: &after,
+	session, err := client.StartSession()
+	if err != nil {
+		return err
 	}
+	defer session.EndSession(ctx)
 
-	err = client.Database(database.DatabaseName).
-		Collection(s.storeName).
-		FindOneAndUpdate(
-			ctx, bson.M{"_id": networkElementToUpdate.ID().String()}, update, &opt).
-		Decode(&updatedLoadedNetworkElement)
+	// 2. Fetch exisiting Entity
+	existingNetworkElement, err := s.getByID(networkElementToUpdate.ID())
 	if err != nil {
-		log.Printf("Could not update NetworkElement: %v", err)
+		return err
+	}
+
+	// 3. Check if Entity.Metadata.ResourceVersion == UpdatedEntity.Metadata.ResourceVersion
+	if networkElementToUpdate.GetMetadata().ResourceVersion != existingNetworkElement.Metadata.ResourceVersion {
+		// 3.1.1 End transaction
+		// 3.1.2 If no -> return error
+
+		return fmt.Errorf(
+			"resource version %d of provided network element %s is older or newer than %d in the store",
+			networkElementToUpdate.GetMetadata().ResourceVersion,
+			networkElementToUpdate.ID().String(), existingNetworkElement.Metadata.ResourceVersion,
+		)
+	}
+
+	// 3.2.1 If yes -> Update entity in callback
+	callback := func(sessCtx mongo.SessionContext) (interface{}, error) {
+		// Important: You must pass sessCtx as the Context parameter to the operations for them to be executed in the
+		// transaction.
+
+		u, _ := networkElementToUpdate.(*CommonNetworkElement)
+		u.Metadata.ResourceVersion = u.Metadata.ResourceVersion + 1
+
+		update := bson.D{primitive.E{Key: "$set", Value: u}}
 
-		return customerrs.CouldNotUpdateError{Identifier: networkElementToUpdate.ID(), Type: networkElementToUpdate, Err: err}
+		upsert := false
+		after := options.After
+		opt := options.FindOneAndUpdateOptions{
+			Upsert:         &upsert,
+			ReturnDocument: &after,
+		}
+
+		err = userCollection.
+			FindOneAndUpdate(
+				ctx, bson.M{"_id": networkElementToUpdate.ID().String()}, update, &opt).
+			Decode(&updatedLoadedNetworkElement)
+		if err != nil {
+			log.Printf("Could not update network element: %v", err)
+
+			return nil, customerrs.CouldNotUpdateError{Identifier: networkElementToUpdate.ID(), Type: networkElementToUpdate, Err: err}
+		}
+
+		// 3.2.2 End transaction
+		return "", nil
+	}
+
+	_, err = session.WithTransaction(ctx, callback)
+	if err != nil {
+		return err
 	}
 
 	return nil
diff --git a/controller/nucleus/networkElement.go b/controller/nucleus/networkElement.go
index 379c468589bf53be840edc01dfa9fcaef39c6293..692253286282564b4c197873f4f292382deee727 100644
--- a/controller/nucleus/networkElement.go
+++ b/controller/nucleus/networkElement.go
@@ -5,6 +5,7 @@ import (
 
 	spb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/southbound"
 	tpb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/transport"
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	"code.fbi.h-da.de/danet/gosdn/controller/customerrs"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkelement"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/southbound"
@@ -17,7 +18,13 @@ import (
 )
 
 // NewNetworkElement creates a network element.
-func NewNetworkElement(name string, uuidInput uuid.UUID, opt *tpb.TransportOption, sbi southbound.SouthboundInterface) (networkelement.NetworkElement, error) {
+func NewNetworkElement(
+	name string,
+	uuidInput uuid.UUID,
+	opt *tpb.TransportOption,
+	sbi southbound.SouthboundInterface,
+	metadata conflict.Metadata,
+) (networkelement.NetworkElement, error) {
 	t, err := NewTransport(opt, sbi)
 	if err != nil {
 		return nil, err
@@ -57,6 +64,7 @@ func NewNetworkElement(name string, uuidInput uuid.UUID, opt *tpb.TransportOptio
 				transport:        t,
 				name:             name,
 				transportOptions: opt,
+				Metadata:         metadata,
 			},
 		}, nil
 	}
@@ -68,6 +76,7 @@ func NewNetworkElement(name string, uuidInput uuid.UUID, opt *tpb.TransportOptio
 		transport:        t,
 		name:             name,
 		transportOptions: opt,
+		Metadata:         metadata,
 	}, nil
 }
 
@@ -89,6 +98,8 @@ type CommonNetworkElement struct {
 	name string
 
 	transportOptions *tpb.TransportOption
+
+	Metadata conflict.Metadata
 }
 
 // ID returns the UUID of the Network Element.
@@ -155,6 +166,11 @@ func (n *CommonNetworkElement) IsTransportValid() bool {
 	return false
 }
 
+// GetMetadata returns the metadate of a network element.
+func (n *CommonNetworkElement) GetMetadata() conflict.Metadata {
+	return n.Metadata
+}
+
 // CsbiNetworkElement is used for the cSBI functionality.
 type CsbiNetworkElement struct {
 	CommonNetworkElement
@@ -190,6 +206,11 @@ func (n *CsbiNetworkElement) SBI() southbound.SouthboundInterface {
 	return n.sbi
 }
 
+// GetMetadata returns the metadate of a network element.
+func (n *CsbiNetworkElement) GetMetadata() conflict.Metadata {
+	return n.Metadata
+}
+
 // ProcessResponse processes a response for the Network Element.
 func (n *CsbiNetworkElement) ProcessResponse(resp proto.Message) error {
 	// TODO: callback to send response to caller
diff --git a/controller/nucleus/networkElementFilesystemStore_test.go b/controller/nucleus/networkElementFilesystemStore_test.go
index 0b6ba8a3193599a741417b8eec19c3b7e5fd7d21..f3bab417480c93d49aabae3eb04a43fc0faa6b85 100644
--- a/controller/nucleus/networkElementFilesystemStore_test.go
+++ b/controller/nucleus/networkElementFilesystemStore_test.go
@@ -5,6 +5,7 @@ import (
 
 	spb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/southbound"
 	tpb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/transport"
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkelement"
 	"code.fbi.h-da.de/danet/gosdn/controller/store"
 	"github.com/google/uuid"
@@ -37,7 +38,7 @@ func TestAddNetworkElement(t *testing.T) {
 	sbi1, _ := NewSBI(spb.Type_TYPE_OPENCONFIG, sbiID1)
 
 	networkElementStore := NewNetworkElementStore(pndID)
-	mne, _ := NewNetworkElement("testNetworkElement", mneID, &trop, sbi1)
+	mne, _ := NewNetworkElement("testNetworkElement", mneID, &trop, sbi1, conflict.Metadata{})
 
 	err := networkElementStore.Add(mne)
 	if err != nil {
@@ -59,12 +60,12 @@ func TestGetAllNetworkElements(t *testing.T) {
 
 	transportOptions := returnBasicTransportOption()
 
-	mne1, err := NewNetworkElement("testname", mneID1, &transportOptions, sbi)
+	mne1, err := NewNetworkElement("testname", mneID1, &transportOptions, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
 
-	mne2, err := NewNetworkElement("testname2", mneID2, &transportOptions, sbi)
+	mne2, err := NewNetworkElement("testname2", mneID2, &transportOptions, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
@@ -112,12 +113,12 @@ func TestGetNetworkElement(t *testing.T) {
 
 	trop := returnBasicTransportOption()
 
-	mne1, err := NewNetworkElement("testname", mneID1, &trop, sbi)
+	mne1, err := NewNetworkElement("testname", mneID1, &trop, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
 
-	mne2, err := NewNetworkElement("testname2", mneID2, &trop, sbi)
+	mne2, err := NewNetworkElement("testname2", mneID2, &trop, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
@@ -158,14 +159,14 @@ func TestUpdateNetworkElement(t *testing.T) {
 	sbi1, _ := NewSBI(spb.Type_TYPE_OPENCONFIG, sbiID1)
 
 	networkElementStore := NewNetworkElementStore(pndID)
-	mne, _ := NewNetworkElement("testNetworkElement", mneID, &trop, sbi1)
+	mne, _ := NewNetworkElement("testNetworkElement", mneID, &trop, sbi1, conflict.Metadata{})
 
 	err := networkElementStore.Add(mne)
 	if err != nil {
 		t.Error(err)
 	}
 
-	mne, _ = NewNetworkElement(updatedNetworkElementName, mneID, &trop, sbi1)
+	mne, _ = NewNetworkElement(updatedNetworkElementName, mneID, &trop, sbi1, conflict.Metadata{})
 
 	err = networkElementStore.Update(mne)
 	if err != nil {
@@ -199,12 +200,12 @@ func TestDeleteNetworkElement(t *testing.T) {
 
 	trop := returnBasicTransportOption()
 
-	mne1, err := NewNetworkElement("testname", mneID1, &trop, sbi)
+	mne1, err := NewNetworkElement("testname", mneID1, &trop, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
 
-	mne2, err := NewNetworkElement("testname2", mneID2, &trop, sbi)
+	mne2, err := NewNetworkElement("testname2", mneID2, &trop, sbi, conflict.Metadata{})
 	if err != nil {
 		t.Error(err)
 	}
diff --git a/controller/nucleus/networkElementService.go b/controller/nucleus/networkElementService.go
index b2af03f9ad0be11c3c63cfcc229a38eab318262b..c300bc6a947618832a3ef07d23dcbcb9ebf97e5f 100644
--- a/controller/nucleus/networkElementService.go
+++ b/controller/nucleus/networkElementService.go
@@ -223,7 +223,10 @@ func (s *NetworkElementService) createNetworkElementFromStore(loadedNetworkEleme
 				GnmiTransportOption: &tpb.GnmiTransportOption{},
 			},
 			Type: spb.Type_TYPE_OPENCONFIG,
-		}, sbiForNetworkElement)
+		},
+		sbiForNetworkElement,
+		loadedNetworkElement.Metadata,
+	)
 	if err != nil {
 		return nil, err
 	}
diff --git a/controller/nucleus/networkElement_test.go b/controller/nucleus/networkElement_test.go
index c6d80416f749c859553c99819ebec9ceb48f2e07..7182a60b14fcd391696eacc78cce9a52a2d14aeb 100644
--- a/controller/nucleus/networkElement_test.go
+++ b/controller/nucleus/networkElement_test.go
@@ -4,6 +4,7 @@ import (
 	"reflect"
 	"testing"
 
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/southbound"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/transport"
 
@@ -101,7 +102,7 @@ func TestNewNetworkElement(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
-			resp, err := NewNetworkElement(tt.args.name, uuid.Nil, tt.args.opts, tt.args.sbi)
+			resp, err := NewNetworkElement(tt.args.name, uuid.Nil, tt.args.opts, tt.args.sbi, conflict.Metadata{})
 			if (err != nil) != tt.wantErr {
 				t.Errorf("NewNetworkElement() error = %v, wantErr %v", err, tt.wantErr)
 				return
diff --git a/controller/nucleus/principalNetworkDomain.go b/controller/nucleus/principalNetworkDomain.go
index f47087040bdf6afa29f76efc66552a04f5213120..0b6d8b999353f80ae6dddc29176ac7722117d8cd 100644
--- a/controller/nucleus/principalNetworkDomain.go
+++ b/controller/nucleus/principalNetworkDomain.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	"code.fbi.h-da.de/danet/gosdn/controller/metrics"
 	"code.fbi.h-da.de/danet/gosdn/controller/nucleus/types"
 	"code.fbi.h-da.de/danet/gosdn/controller/nucleus/util"
@@ -268,7 +269,7 @@ func (pnd *pndImplementation) AddNetworkElement(name string, opt *tpb.TransportO
 		}
 	}
 
-	mne, err := NewNetworkElement(name, uuid.Nil, opt, sbi)
+	mne, err := NewNetworkElement(name, uuid.Nil, opt, sbi, conflict.Metadata{ResourceVersion: 0})
 	if err != nil {
 		return uuid.Nil, err
 	}
@@ -786,7 +787,7 @@ func (pnd *pndImplementation) createCsbiNetworkElement(
 		if err != nil {
 			return uuid.Nil, err
 		}
-		mne, err := NewNetworkElement(name, uuid.Nil, csbiTransportOptions, csbi)
+		mne, err := NewNetworkElement(name, uuid.Nil, csbiTransportOptions, csbi, conflict.Metadata{ResourceVersion: 0})
 		if err != nil {
 			return uuid.Nil, err
 		}
diff --git a/controller/nucleus/principalNetworkDomain_test.go b/controller/nucleus/principalNetworkDomain_test.go
index f078ebae618c688e149a88eddca3a84b57a3eb3b..9d8ee014c230f958f1f50b5ac33a0905d684f07e 100644
--- a/controller/nucleus/principalNetworkDomain_test.go
+++ b/controller/nucleus/principalNetworkDomain_test.go
@@ -12,6 +12,7 @@ import (
 	ppb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/pnd"
 	spb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/southbound"
 	tpb "code.fbi.h-da.de/danet/gosdn/api/go/gosdn/transport"
+	"code.fbi.h-da.de/danet/gosdn/controller/conflict"
 	eventservice "code.fbi.h-da.de/danet/gosdn/controller/eventService"
 	eventInterfaces "code.fbi.h-da.de/danet/gosdn/controller/interfaces/event"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkdomain"
@@ -834,7 +835,7 @@ func Test_pndImplementation_GetNetworkElement(t *testing.T) {
 		t.Error(err)
 		return
 	}
-	mne, err := NewNetworkElement("default", mneid, opts, sbi)
+	mne, err := NewNetworkElement("default", mneid, opts, sbi, conflict.Metadata{ResourceVersion: 0})
 	if err != nil {
 		t.Error(err)
 		return
@@ -906,7 +907,7 @@ func Test_pndImplementation_GetNetworkElementByName(t *testing.T) {
 		t.Error(err)
 		return
 	}
-	mne, err := NewNetworkElement("my-mne", mneid, opts, sbi)
+	mne, err := NewNetworkElement("my-mne", mneid, opts, sbi, conflict.Metadata{ResourceVersion: 0})
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/controller/rbac/databaseUserStore.go b/controller/rbac/databaseUserStore.go
index fe39f26c2b12a2cbb4981ce3b2d89b970db0bac8..da455a8603b452507018135c889b11d231f57f2f 100644
--- a/controller/rbac/databaseUserStore.go
+++ b/controller/rbac/databaseUserStore.go
@@ -200,20 +200,20 @@ func (s *DatabaseUserStore) Update(userToUpdate rbac.User) (err error) {
 	defer session.EndSession(ctx)
 
 	// 2. Fetch exisiting Entity
-	existingNode, err := s.getByID(userToUpdate.ID())
+	existingUser, err := s.getByID(userToUpdate.ID())
 	if err != nil {
 		return err
 	}
 
 	// 3. Check if Entity.Metadata.ResourceVersion == UpdatedEntity.Metadata.ResourceVersion
-	if userToUpdate.GetMetadata().ResourceVersion != existingNode.Metadata.ResourceVersion {
+	if userToUpdate.GetMetadata().ResourceVersion != existingUser.Metadata.ResourceVersion {
 		// 3.1.1 End transaction
 		// 3.1.2 If no -> return error
 
 		return fmt.Errorf(
 			"resource version %d of provided user %s is older or newer than %d in the store",
 			userToUpdate.GetMetadata().ResourceVersion,
-			userToUpdate.ID().String(), existingNode.Metadata.ResourceVersion,
+			userToUpdate.ID().String(), existingUser.Metadata.ResourceVersion,
 		)
 	}