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', 'c9ace09c12bbbd0855ebdf5f1eb45145', '216.73.216.3', '1767618867', '1767618867', '/product_info.php?info=p3246_Japan---Kyushu-Reliefkarte.html')

[XT SQL Error]