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', 'euiobefq8b7d3v86mbg8dd9on2', '3.144.6.159', '1746971389', '1746971389', '/product_info.php?info=p558_805814-Rauchrohrreduzierung-fuer-druckfeste-Badeoefen.html')

[XT SQL Error]