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', '5od8u498i36ql4rha5g0jujrj5', '216.73.216.30', '1751751274', '1751751274', '/product_info.php?info=p86_Badeofen-Mischbatterie.html')

[XT SQL Error]