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', '3pec11602fs513a31t699btro2', '216.73.217.165', '1790783259', '1790783259', '/xtshop/index.php?cat=c24_.html')

[XT SQL Error]