How to avoid overwriting Contacts with forms?

My PHP version is : PHP Version 7.4.23
My MySQL version is : 5.7.32-35-log

Is there a way to prevent overwriting a Contact by using a form multiple times? At this point, if a contact data is in the system and someone submits the form again, for the same email, the new data that comes with the new submission, overwrites the existing data…

Is there a way to prevent this?

like, if the email is already in the system, a new submission is not possible, and an error is displayed like email already associated with a Contact

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