1366 - Incorrect integer value: '' for column `creatihu_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', 'aaef716a7af408ea88bf8f453fd24a63', '54.81.136.84', '1711696441', '1711696441', '/product_info.php?info=p323_Selbstklebende-Folie--3-5-Jahre.html')

[XT SQL Error]