I feel dumb I realize this is an old entry, but I'll post a reply for anyone else that has this same problem... You can make more than one character. Make a new one and put THAT character nickname in here. Unless, for some reason, you still put in your high level nickname, despite already knowing you were too high level. (Why would you do that, though?) If that's the case, delete that character and start a new one with the same name. If you're not willing to do that, you may be able to have support change the name you entered to a different one. Otherwise, you're screwed. lol