Hi I have a cfw 3ds running 11.2.0-35U, I bought this 3ds from somebody and it had their Nintendo ID still on their. I really want to get rid of their ID and make my own because I don't know the email or password. And I can't change it. The only way I'm seeing to do this is format my 3ds or something and I'm assuming that will just ruin my cfw. So is their any other way I can do this with out wiping my 3ds? Thank you.