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', '6427a9c7a753969609dc78852df81d1c', '216.73.216.108', '1763397599', '1763397599', '/product_info.php?info=p1826_Guadeloupe-2-Satellitenbild.html')

[XT SQL Error]