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', 'u2hgop9iqfieuevrnlm682jrb0', '18.224.37.28', '1738996196', '1738996196', '/index.php?XTCsid=qi1463dp261ivpfjuiqmhrofh5&cat=c1246_Werkzeug.html')

[XT SQL Error]