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', 'es9mbdlmrliiap7gajqpc6e2p2', '18.190.156.80', '1713520443', '1713520443', '/login.php?XTCsid=es9mbdlmrliiap7gajqpc6e2p2')

[XT SQL Error]