1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '912df68fc0ef3e10c4334be9be8c7354', '216.73.216.121', '1751587405', '1751587405', '/shop_content.php/coID/7/content/Contact')

[XT SQL Error]