1366 - Incorrect integer value: '' for column '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', '31uvio2m1976nhj67snm0nhui3', '216.73.216.167', '1762632074', '1762632074', '/index.php?XTCsid=d3edd3fcb58e1977f2007b47233256d4')

[XT SQL Error]