Issues with Apple ID profile on iPad

before iPad was connected with my daughter account

we delete her account and she create new one. iPad was on all the time. Now u understand that we cannot do any think with that. Say that Apple ID is not existing any more. We have password and now all the time device inform us to log in on profile and when we use our login and pass inform us that there is not any users with that criteria. What we have to do?

[Edited by Moderator]