How to delete all records of a form from database?

Just use the following SQL query - you only have to exchange the form key warrantyRegistration.

DELETE FROM tx_fluidform_domain_model_field WHERE fluidform IN (
    SELECT uid FROM tx_fluidform_domain_model_form WHERE form_key = 'warrantyRegistration'
);
DELETE FROM tx_fluidform_domain_model_form WHERE form_key = 'warrantyRegistration';

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TYPO3 Fluid-Form by coding.ms

Forms created and configured entirely with TypoScript. Ajax forms, flexible field sets, notes, captcha, MathGuard, and honeypot support a wide range of use cases. Finishers can send emails, write submitted data to a database, or generate PDFs. A backend module provides an overview of mails and requests, making form handling easier to maintain and manage.

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