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', '99db09f7a7ec8f7a2868c0b395853d9c', '216.73.216.28', '1763615702', '1763615702', '/product_info.php?info=p1522_Mongolei-Satellitenbild.html')

[XT SQL Error]