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', 'a27irb1plbpjqdhoaqgfh1roo4', '18.218.149.167', '1738993882', '1738993882', '/index.php?XTCsid=8km4iag7d9anolhh9c02p13aq2&cat=c527_Digital-Kamera-Zubeh--r.html')

[XT SQL Error]