In my opinion, you should set different ValidationGroup property values ββfor repeater control and for control, which is the source of the required validation field. Perhaps the container for re-management raised an event that can be repaired using the required validation field.
If the above does not help, try disabling client validation for RequiredFieldValidator using EnableClientScript="False" for this. And activate RequiredFieldValidator when it is really useful. For example, in the event handler of some buttons, you can apply the following code:
MyButton.Validate(); if (MyButton.IsValid) { Do what you want... }
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