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', '394f1a7f65c26a2d95e213d9cbd7de8a', '216.73.216.9', '1759492861', '1759492861', '/product_info.php?info=p2678_Westsahara-Reliefkarte.html')

[XT SQL Error]