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', '4721724d34e56cde88e52bf8e5bee9d6', '216.73.216.3', '1767584886', '1767584886', '/product_info.php?info=p2925_Svalbard-2-Reliefkarte.html')

[XT SQL Error]