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', '05188474e481ee83fcda6db43c3c64d4', '216.73.216.158', '1748749942', '1748749942', '/product_info.php/info/p10_3D-Druck.html')

[XT SQL Error]