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', 'h44g2o9030g32vvssmr79p7it2', '3.15.202.214', '1713552566', '1713552566', '/login.php?XTCsid=h44g2o9030g32vvssmr79p7it2')

[XT SQL Error]