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', 'd5710903b487f9ec56d44a91843c99be', '3.235.139.122', '1711631915', '1711631915', '/product_info.php?info=p52_Trompeten-Galopp--Bravour-Polka-.html&XTCsid=c00a13a977272d3659dd7fe5a5f758e9')

[XT SQL Error]