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', '03bfbe9c9c7d2a58f13b86f6a8cbd3fc', '216.73.216.28', '1763580455', '1763580455', '/product_info.php?info=p3172_Westsahara-Reliefkarte.html')

[XT SQL Error]