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', 'fes5ca6q2b0vss99a2jp3mn0u6', '3.140.196.222', '1738998634', '1738998634', '/index.php?XTCsid=8e9c41f9ih262sbjeph8l1hut4&cat=c638_Blei-Akkus.html')

[XT SQL Error]