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', 'bg9toql62qp1jrb6fif1pskl91', '35.173.181.0', '1711695070', '1711695070', '/login.php?XTCsid=bg9toql62qp1jrb6fif1pskl91')

[XT SQL Error]