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', '52.91.0.68', '1711677211', '1711677211', '/login.php?XTCsid=bg9toql62qp1jrb6fif1pskl91')

[XT SQL Error]