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', '2jikq60o6n4r528o5j2c1756k4', '216.73.216.130', '1760972149', '1760972149', '/product_info.php?info=p148_405823-Pfostentraeger--Platte--zum-Aufschrauben-verstellbar.html')

[XT SQL Error]