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', '21d1b7774a18ff6ea216c466ac491f88', '216.73.216.3', '1767491395', '1767491395', '/product_info.php?info=p3215_Jordan-Reliefkarte.html')

[XT SQL Error]