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', 'ql539n1td68l0s413a5qei0b81', '18.188.142.146', '1714061737', '1714061737', '/login.php?XTCsid=ql539n1td68l0s413a5qei0b81')

[XT SQL Error]