I used the name Yermokhin when I was using a steam account not linked to a VRChat account. And I accidentally changed my display name after linked to my VRChat account.

Now I want to change my name back to the original one, but it says "That display name is already in use". So I try to search for it, nobody use it as a display name.

So I think that it's a bug, and I really want to change into my original name.