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', 'b5ftd2tf9sngo8vqpf62bc9a53', '3.227.239.9', '1711647382', '1711647382', '/login.php?XTCsid=b5ftd2tf9sngo8vqpf62bc9a53')

[XT SQL Error]