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', 'lga147112asf1c8t7j0c6cq9r3', '3.22.77.244', '1738997574', '1738997574', '/index.php?XTCsid=nmu1l7bj1113ksvu525rsptc72&cat=c1239_Smartwatch-Akku.html')

[XT SQL Error]