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', 'ihhu7mtorjlbovpfgnautfcl96', '3.139.72.173', '1738997803', '1738997803', '/index.php?XTCsid=c8tsstf8ajiodlgrn3rqsr62b1&cat=c642_Kabel.html')

[XT SQL Error]