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', '4a4a7u0h6p065nsbt0cq0mrs44', '3.128.28.117', '1738998218', '1738998218', '/index.php?XTCsid=3o9rajic4fkoo3bb243kehab14&cat=c720_Werkzeuge-f--r-Smartphone-Tablet.html')

[XT SQL Error]