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', 'n5k9ie0r537rh4cebvrncn8290', '18.209.63.120', '1711626276', '1711626276', '/login.php?XTCsid=n5k9ie0r537rh4cebvrncn8290')

[XT SQL Error]