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', 'b6ab790cab6f195571e3a363d29ec555', '3.144.48.135', '1713620603', '1713620603', '/product_info.php?language=de&info=p247_Nessun-Dorma.html&XTCsid=a33edcfe7a4d0f8d478a4ad1978f2859')

[XT SQL Error]