1366 - Incorrect integer value: '' for column `pella-ware`.`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', '5jac5kubg2mpqt1hdo72pgpin0', '3.94.98.40', '1711715428', '1711715428', '/login.php?XTCsid=5jac5kubg2mpqt1hdo72pgpin0')

[XT SQL Error]