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', '4133f7957ab476f188210e8ecc340ba6', '3.137.161.222', '1713972187', '1713972187', '/product_info.php?info=p53_Fruehling-an-der-Donau--Walzer-.html&XTCsid=20bbdc77ade4d1698ba2b6b1a9e7f349')

[XT SQL Error]