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', '619ff1fca09a29d7f9114a4a74e1104d', '3.238.87.31', '1711634004', '1711634004', '/product_info.php?language=en&info=p247_Nessun-Dorma.html&XTCsid=1ac6c2897c9e1517fbc2b6cff40eabd3')

[XT SQL Error]