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', 'd5c9c12ab5ea66541d01070dc7ebe0b5', '216.73.216.121', '1751588239', '1751588239', '/popup_content.php/coID/1')

[XT SQL Error]