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', 'd1p11o86fj8a4i04nq7egjo3d3', '216.73.216.119', '1758208397', '1758208397', '/xtshop/index.php?cat=c7_.html')

[XT SQL Error]