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', 'c74hak9eh5d67b2qjg4k6ip702', '18.188.30.161', '1738998795', '1738998795', '/index.php?XTCsid=nmu1l7bj1113ksvu525rsptc72&cat=c710_LED-Leuchtmittel.html')

[XT SQL Error]