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', '7plapniq9b92jf1vfg6nb2aio2', '44.213.80.203', '1711635702', '1711635702', '/login.php?XTCsid=7plapniq9b92jf1vfg6nb2aio2')

[XT SQL Error]