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', 'krc5oaao624v7of9e9f4a5uhb7', '18.221.124.202', '1738999896', '1738999896', '/index.php?XTCsid=c8tsstf8ajiodlgrn3rqsr62b1&cat=c925_Tablet-PC---E-Reader-Zubeh--r.html')

[XT SQL Error]