Steps to reproduce:

1. Import the attached package
2. Open Color Subgraph
3. Select bool node and BoolOUT output property
4. Convert it subgraph operator

Actual results: Error is thrown, subgraph is created but nodes that were converted are not removed from the graph

Expected results: Selected nodes are converted and replaced by a new subgraph operator

Reproducible with versions: 6000.3.0a1, 6000.3, 6000.2, 6000.0, 22.3

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): macos

Notes:

• ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

Parameter name: index
System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at <99171171339349389f35e8f773fca141>:0)
UnityEditor.VFX.VFXSlotContainerModel`2[ParentType,ChildrenType].GetOutputSlot (System.Int32 index) (at ./Library/PackageCache/com.unity.visualeffectgraph@14.0.12/Editor/Models/VFXSlotContainerModel.cs:63)