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', '8s1qvd9arqrg9sgqnbirj3ugr2', '44.205.5.65', '1711677826', '1711677826', '/login.php?XTCsid=8s1qvd9arqrg9sgqnbirj3ugr2')

[XT SQL Error]