@Jxrdanb you'll need to log into the account that it is linked to and unlink it. then you'll be able to link it to another account.
If you can't remember the credentials to log into that other account, you'll need a mod / staff to help, but you'll need to have proof that it is your account of course (plutonium and steam) but even then i don't know if they'll be able to help.
