1366 - Incorrect integer value: '' for column `usr_web74_1`.`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', '7kut98ckemgcqagkjaciacr5n2', '216.73.216.158', '1770887199', '1770887199', '/product_info.php?info=p1539_Oware-little-Croc.html')

[XT SQL Error]