Hey , long time buddy.
Let me think here… okay I think I remember a couple other details about what I was doing at that moment. I had created a Blueprint (Pawn based Actor) a while back and wanted to replace it with another that had the same name. Mind you, on this game, its using Perforce and was active at the time during this (in case Perforce is related).
I didn’t have any of those Actors in the scene at the time so no instances present and what I usually do is rename an Asset to ‘Name’_DEPRECIATED and on the next build check-in, I then usually re-reference that asset in any levels/actor instances current (in a case like this where I wanted it to be re-created). I think I was moving real quick and deleted the original asset, created a new one, attempted to rename it but was told about conflicts and at that moment, I hit undo (Ctrl+Z) accidently and was presented with this error.
Anyways, let me know your thoughts and its possible that extra information will help out. Hope you’ve been well since we last spoke and take it easy !