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', 'fc4d537d6631bfef0e3b9d05f2366ad4', '216.73.216.191', '1758179055', '1758179055', '/shop_content.php/coID/7/content/Kontakt')

[XT SQL Error]