Thread:Dankdog04/@comment-24577221-20171021195150

When you added your Friend Code to the list, you replaced someone else's code. That's probably because both of you were editing the list at the same time, and you "published" your change right after the other person did. An accident.

But the wiki warns you if something like that is happening, and you ignored the warning. Be more careful in future, or you will be blocked from editing. 