1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'h3fe5t9bi7eafj5kc2skvdkla5', '18.97.9.170', '1742531645', '1742531645', '/product_info.php?info=p608_804688-Knochenquetsche.html')

[XT SQL Error]