Board Thread:Support Requests - Getting Started/@comment-36387140-20180824173951/@comment-1038387-20180824175059

No, you can't. Usernames are not recycled, and usernames cannot be changed twice* (nor can changes be reversed). Those are all technical limitations in MediaWiki.

* Well, technically it can be changed twice to something new but because that creates a lot of cleanup work across the network FANDOM doesn't do that.