diff --git a/documentation/design/05-implementation.md b/documentation/design/05-implementation.md
index 8ca3e4cb65d1a8567ad14c1eed163160337cab97..ef7adcbcc5ef3dc61e1c43adaf4deb44135befc1 100644
--- a/documentation/design/05-implementation.md
+++ b/documentation/design/05-implementation.md
@@ -53,7 +53,7 @@ graph TB
   SubGraph1 --> SubGraph1Flow
   subgraph "G_logical1"
   SubGraph1Flow(SubNode 1)
-  Node1[Node 1] <--> Node2[Node 2] <--> Node3[Node 3] <--> Node4[Node 4]
+  Node1_l1[Node 1] <--> Node2_l1[Node 2] <--> Node3_l1[Node 3] <--> Node4_l1[Node 4]
   end
 
   subgraph "G_physical"