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', '83ri04g1jtotjte2lgm6hda9q4', '3.17.162.245', '1738994964', '1738994964', '/index.php?XTCsid=3urkhm9sdqaa68rq8ocuqac7t6&cat=c803_RAID-Controller-Akku.html')

[XT SQL Error]