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', '13jmr21q7ntddj8chl6qquhdk1', '18.227.72.200', '1738997535', '1738997535', '/index.php?XTCsid=b08vstu7leg8ef8i43caoskln6&cat=c639_Akkus.html')

[XT SQL Error]