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', '78e3b9879c5df443f335f245c8a6d5e2', '216.73.216.20', '1771725202', '1771725202', '/product_info.php?info=p3473_Niederlande-Reliefkarte.html')

[XT SQL Error]