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', 'dc2b8a88f01544285e8d6f32121cf1eb', '18.189.13.43', '1713866608', '1713866608', '/product_info.php?info=p298_Bei-uns-in-Bayern.html&XTCsid=3cd37329143049d8f2fab7a46749bac8')

[XT SQL Error]