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', '22306d997653c1856d0a4d229b1def61', '3.15.221.67', '1713989211', '1713989211', '/account.php?XTCsid=887fff7384999e8c958f14224ebe6b7c')

[XT SQL Error]