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';