The email is a must field for the user. So accidently, If the admin removes the email and updates, it gets updated. But it is a required field and should not get updated without a proper email address (like wise others pages etc as well).
I tried to add validation but since it is written to update multiple users at the same time, I feel difficult in doing so.
Also when creating/editing a page if a menu option is not chosen then php error appears on top after submission.
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