Itunes Apple ID differs from actual Apple ID
Hello everyone!
I really need help. I gave my old iPad to my sister to use after factory resetting it. To my surprise I have since been unable to update my apps as it keeps bringing up her own Apple ID . I have changed my own ID to a different one and asked to carry out another reset. In settings my name and ID is there. But when I want to update my apps it still asks me to sign in with her own Apple ID which is her email address. What can I do?
Frustrated User
iPad Air, iOS 12