1366 - Incorrect integer value: '' for column `CP_as15`.`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', '4661p5psvdai9b5clqjlj714p2', '3.136.23.84', '1738997177', '1738997177', '/index.php?XTCsid=rkdf8qfiujodbcb5st13ohfmn6&cat=c167_Dewalt---Elu-Werkzeug-Akku.html')

[XT SQL Error]