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', 'f65chaat492ci99avmre2ga2s6', '18.221.24.226', '1738998181', '1738998181', '/index.php?XTCsid=rkdf8qfiujodbcb5st13ohfmn6&cat=c175_Festo---Festtool-Werkzeug-Akku.html')

[XT SQL Error]