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', '576839e315134bf18a66336f41aa6ce9', '3.17.128.129', '1713609646', '1713609646', '/product_info.php?info=p53_Fruehling-an-der-Donau--Walzer-.html&XTCsid=12ab6c593489deceb1c19806497af77d')

[XT SQL Error]