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', '7evbrbrss10guvkqsj7am7te44', '18.116.50.186', '1738998981', '1738998981', '/index.php?XTCsid=c8tsstf8ajiodlgrn3rqsr62b1&cat=c527_Digital-Kamera-Zubeh--r.html')

[XT SQL Error]