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', 'bu2a2v5gh9smc1er7ici301075', '18.223.172.110', '1738993476', '1738993476', '/index.php?XTCsid=3urkhm9sdqaa68rq8ocuqac7t6&cat=c1012_Geschenkidee.html')

[XT SQL Error]