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', '5746fgj6cg171h81qn6fd3pqp4', '3.144.46.105', '1738999134', '1738999134', '/index.php?XTCsid=rkdf8qfiujodbcb5st13ohfmn6&cat=c937_Satelliten-Zubeh--r.html')

[XT SQL Error]