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', '8n9a1ebf56bh857ilubi3mcsn3', '18.191.192.229', '1738999192', '1738999192', '/index.php?XTCsid=mkl8qqqorbnshicuaf45rnrdo2&cat=c937_Satelliten-Zubeh--r.html')

[XT SQL Error]