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', '72b57acd6327345470ed3c6c431741f2', '216.73.216.108', '1763401823', '1763401823', '/shopping_cart.php')

[XT SQL Error]