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', '6k6b1m4fsh4crctkfit2d9nfn1', '54.173.43.215', '1711649288', '1711649288', '/login.php?XTCsid=6k6b1m4fsh4crctkfit2d9nfn1')

[XT SQL Error]