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', '155qcqvkg70ott9d9o055rq581', '18.97.9.175', '1745803855', '1745803855', '/product_info.php?info=p658_806057-Hackfruchtreibe-Extrafein.html')

[XT SQL Error]