1366 - Incorrect integer value: '' for column `hbl_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', 'tlrmbjho3m93ro1m4mo9pvcen4', '13.58.229.23', '1746943966', '1746943966', '/product_info.php?info=p535_405779-Pfostentraeger-Dorn-zum-Einbetonieren-Platte-80x80.html')

[XT SQL Error]