I had trouble migrating my family actually. The old account owners couldn't accept the request to join my account as a side profile, because their profile alrea

I had trouble migrating my family actually. The old account owners couldn't accept the request to join my account as a side profile, because their profile already "existed". Even though we had canceled them. Waiting until the billing period ended resolved it, but it was definitely not smooth. Waiting 2+ weeks isn't a good policy.