Copy creates duplicates that are never fixed

Long ago. I never ever copied controls. Ever. then I watched your videos and I noted how you copied controls around and thought it was clever. So I created some of the functions in my main graphs this way. copies of each other.

Ever since then. When i load the graph first time I get:
Could not load graph data: TownGenFunctionWrapper
System.ArgumentException: An item with the same key has already been added. Key: 5306472913577181282
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in :0
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in :0
at MapMagic.Nodes.Graph.CheckFixIdsRecursively (System.Collections.Generic.HashSet`1[T] susGens, System.Collections.Generic.Dictionary`2[TKey,TValue] allIds, System.Collections.Generic.Dictionary`2[TKey,TValue] oldNewIds, System.Collections.Generic.List`1[T] zeroNewIds) [0x000a5] in \Assets\MapMagic\Nodes\Graph.cs:243
at MapMagic.Nodes.Graph.CheckFixIdsRecursively (System.Collections.Generic.HashSet`1[T] susGens, System.Collections.Generic.Dictionary`2[TKey,TValue] allIds, System.Collections.Generic.Dictionary`2[TKey,TValue] oldNewIds, System.Collections.Generic.List`1[T] zeroNewIds) [0x0011e] in \Assets\MapMagic\Nodes\Graph.cs:257
at MapMagic.Nodes.Graph.CheckFixIds (System.Collections.Generic.HashSet`1[T] susGens) [0x00013] in \Assets\MapMagic\Nodes\Graph.cs:212
at MapMagic.Nodes.GraphSerializer200Beta.Deserialize (MapMagic.Nodes.Graph graph) [0x00100] in \Assets\MapMagic\Nodes\GraphSerializer.cs:80
at MapMagic.Nodes.Graph.OnAfterDeserialize () [0x0000f] in \Assets\MapMagic\Nodes\Graph.cs:1156
UnityEngine.Debug:LogError (object,UnityEngine.Object)
MapMagic.Nodes.Graph/c__DisplayClass78_0:b__0 () (at Assets/MapMagic/Nodes/Graph.cs:1164)
Den.Tools.Tasks.CoroutineManager:Update () (at Assets/MapMagic/Tools/ThreadManager/CoroutineManager.cs:136)
MapMagic.Core.MapMagicObject:Update () (at Assets/MapMagic/Core/MapMagicObject.cs:144)

The Only explanation is that the code to fix ID's is NOT fixing ID's. Maybe in function sub graphs?

Anyway. running the graph once fixes that until the next time I have to reload.