Game got renamed without changing it?

Hello, i'm the owner of a game and yesterday i have made another game. But something happened, that new game was called "untitled" and now my other game was renamed to "untitled". The genre is a script builder. Why did this happen? My name had a name that roblox doesn't accept anymore but somehow was accepted before. I know this is not a scripting question, but i'm concerned about this. I never renamed the game, why was this?