I don't think this will be that useful, but for what it's worth, I had the exact same issue. My kid's account is marked as a child account, and linked to my adu

I don't think this will be that useful, but for what it's worth, I had the exact same issue. My kid's account is marked as a child account, and linked to my adult account (which was a nightmare in itself, but that's another story). I don't know what I did, but I did eventually manage to get it unlocked. I basically went through every possible permutation of links, which is why I don't remember what worked. It was something to do with unlocking it from the parent account, after _re-linking_ it to my account. Sorry I can't help more than that, but at least you know it's possible now ... somehow ;) P.S. The "security" of allowing a child to link their account to anyone who asks them to enter their email address is hilariously terrifying.