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', '7v345dvv5v0f3qbbeep0v73kt1', '18.222.225.252', '1738998598', '1738998598', '/index.php?XTCsid=rkdf8qfiujodbcb5st13ohfmn6&cat=c704_Mafell-Werkzeug-Akku.html')

[XT SQL Error]