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', 'fikfb66fesms574iliq0p743u4', '18.226.166.214', '1713486012', '1713486012', '/login.php?XTCsid=fikfb66fesms574iliq0p743u4')

[XT SQL Error]