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', '13739b6fe5e9463d37cf0f0f1f005d5d', '3.140.186.201', '1714869114', '1714869114', '/product_info.php?info=p226_Mystery-1-Trompete.html')

[XT SQL Error]