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', '80415dcf2e796e3b9ee235620ef80caa', '52.90.142.26', '1711694497', '1711694497', '/product_info.php?language=en&info=p247_Nessun-Dorma.html&XTCsid=8c4102f41ddb20799250c1276e1c9d62')

[XT SQL Error]