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', 'sn7f2nshg1c8953chpb0f7egb1', '3.140.188.75', '1738995137', '1738995137', '/index.php?XTCsid=qi1463dp261ivpfjuiqmhrofh5&cat=c275_Navigationssystem-Akkus.html')

[XT SQL Error]