Re-set of phone when attached apple ID has been deleted
I just purchased a first phone for my 11-year old daughter - a secondhand iphone 8. I booted up the phone and created an apple ID for her. We shortly after had to delete the ID, as we for uknown reasons could not make it work or family-pair it with her mom's ID. So we thought: let's try again from the start since it had'nt been used yet and have her mon make one.
Unfortunately we forgot to reset the phone before the ID was deleted by apple.
So now I can't be allowed to re-set the phone completely back to original settings and delete old inputs, unless given access by my daughters apple ID - which does'nt exist anymore. It needs the password to disable the 'Find'-functionality and activation-lock. Doh!
How do I get out of that problem?
iPhone 8