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', '23e44d08b7c332ffd8c2d0d25ba90c25', '216.73.216.142', '1758240852', '1758240852', '/product_info.php/language/de/info/p1538_Namibia-Satellite-Image.html')

[XT SQL Error]