1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', 'bdf356f23c99fb93352804809f29dcb6', '3.135.213.214', '1713502339', '1713502339', '/index.php?cat=c50_Digitaldruck-Banner--PVC-Plane.html')

[XT SQL Error]