1366 - Incorrect integer value: '' for column `hbl_shop`.`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', '2655iqk8otetah6a66qq9g0211', '216.73.216.89', '1766233608', '1766233608', '/login.php')

[XT SQL Error]