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', '0d73aef84523317592c3edcb5721ecca', '3.138.122.4', '1714016169', '1714016169', '/product_info.php?info=p247_Nessun-Dorma.html&XTCsid=cb0ad84d7acc90898c9ea3492fbc1557')

[XT SQL Error]