Need quick Oscommerce (CreLoaded) db fix

Getting the following error everytime I try to Create account / checkout without account: 1062 - Duplicate entry '15' for key 1 insert into customers_info (customers_info_id, customers_info_number_of_logons, customers_info_date_account_created) values ('15', '0', now()) [TEP STOP] It MUST be done in the next hour or two tho. Payment via PAYPAL upon COMPLETION Many Thanks