1366 - Incorrect integer value: '' for column `pella-ware`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'ml7c6d0nfgs1fj3jlttp9o6su5', '3.146.221.52', '1713602168', '1713602168', '/login.php?XTCsid=ml7c6d0nfgs1fj3jlttp9o6su5')

[XT SQL Error]