Cannot upgrade from previous account to teen account

@Bravojustakid117 

Child accounts are usually linked to full access (“adult”) accounts. You can only upgrade a child account from the child account — you can’t make this change from the adult account. You or your parent or guardian must log in to the child account to update it.

https://help.ea.com/en-us/help/account/aging-up-an-origin-account-to-an-adult-account