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', 'nu6k2f4fu7shsmv1r9fk2aiks0', '44.222.212.138', '1711640032', '1711640032', '/login.php?XTCsid=nu6k2f4fu7shsmv1r9fk2aiks0')

[XT SQL Error]