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', 'ivfani6lhcjkle2d8l2g5m1l81', '3.91.43.22', '1711717429', '1711717429', '/login.php?XTCsid=ivfani6lhcjkle2d8l2g5m1l81')

[XT SQL Error]