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', '6783cf1b6d38e7521b8c6e7aaa1c1ae9', '216.73.216.3', '1767297073', '1767297073', '/product_info.php?info=p2701_Uganda-Reliefkarte.html')

[XT SQL Error]