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', 'a4d3a6f8ad8564fd5436d9cf437aee35', '216.73.216.9', '1759454428', '1759454428', '/product_info.php?info=p1669_Die-Gambia-Satellitenbild.html')

[XT SQL Error]