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', '5it9drv6ng7vj2knalsp9thgq1', '44.213.65.97', '1711692939', '1711692939', '/login.php?XTCsid=5it9drv6ng7vj2knalsp9thgq1')

[XT SQL Error]