CC v3.5.1
Error:

It appears {that a} “ghost” variable is staying within the serialized file of animation graph after a duplication and deleting a variable

How to presumably reproduce:

1. Create a animation graph with a set off variable
2. Duplicate it
3. Delete the variable within the new animation graph, and create a brand new set off variable
4. Try to make use of the newly created graph

I used to be instructed to report by github