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', '54f06b565dc5d6ede4c23a75f576bea8', '216.73.216.30', '1768502664', '1768502664', '/shop_content.php/language/de/coID/4')

[XT SQL Error]