I have created a Google account for my child about a year ago so that I could use it on a Chromebook for her to play with. The account has been added as a Child account in Family Link. Today, I changed the birthday on the account because the year was incorrect. I probably lied about it while creating the account because a normal Google account cannot be created at her age. I read that child accounts (under age 13) can exist while being supervised with Family Link so no need to lie about it any more. After changing the date the account got suspended for age restriction. But why? It is being supervised! I can see the account in my Family Link (https://families.google.com).
What am I doing wrong here? How to unblock the account?