Character name change for no reason or banned name

Hi, I've been out of the game for about a month due to work, and when I try to log in with one of my characters, I'm faced with this: Apparently, someone wants my character's name, and I'm presented with the option to change character, which I won't be using. Is there a problem with my character's name?

https://imgur.com/oFP3WG8

It's a bug that happened during the yearly cleanup and that hasn't been fixed (yet?). I think your only option is to rename the character to anything else and then purchase a name change with points (can that be done in Lordaeron?) to go back to your original name.