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', 'uj8pbf97j6vq6qp4fsefkbs1v2', '216.73.216.47', '1758103861', '1758103861', '/index.php?cat=c61_Schaedlingsbekaempfung.html')

[XT SQL Error]