It means, the credit card you are using to make your account with, is used in another account. If it's a parents card, it's most likely they have their own account, with that credit card bound to.

TL;DR: Credit card in use on one account, can't be on 2

It means, the credit card you are using to make your account with, is used in another account. If it's a parents card, it's most likely they have their own account, with that credit card bound to. TL;DR: Credit card in use on one account, can't be on 2