Family sharing
I created my son account but put in wrong year it won’t let me update it.
iPod Nano (6th Gen)
Question marked as
Be sure to enter your correct date of birth. After you change it to any age below 13, you can't edit it. Learn more about Apple IDs for children.
Apple ID - Update the birth date associated with
If the above is the problem and you just created the ID, create a new ID.