"ArgumentException: An item with the same key has already been added" is thrown when changing Expression Node's Type and it's connected to a Node

Steps to reproduce:

1. Create a URP 3D Project
2. In the Project Browser create an Empty Shader Graph
3. In the Fragment add the Base Color Node
4. Create an Expression Node and connect it to the Base Color
5. Change the Expression Node's Type via it's dropdown menu

Actual results: Error "ArgumentException: An item with the same key has already been added. Key: A
System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <550ccb07b65848deac5079b8706ec676>:0)
System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) (at <550ccb07b65848deac5079b8706ec676>:0)" is logged

Expected results: No Error is thrown

Reproducible with versions: 6000.5.0a9, 6000.5.0b10, 6000.6.0a6

Not reproducible with versions: 6000.0.76f1, 6000.3.16f1, 6000.4.9f1, 6000.5.0a8 (Templates list is immediately populated)

Tested on (OS): Windows 11