1366 - Incorrect integer value: '' for column `shop_db3`.`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', '902afc18afcdc9adba66786e9253624e', '3.133.147.87', '1713556567', '1713556567', '/product_info.php?language=de&info=p246_Dream-Melody.html&XTCsid=842cd293d4e43dd66c33a18be5c47b55')

[XT SQL Error]