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', 'tio9ae0uoecrqfpvj6de96gg12', '216.73.216.209', '1767087000', '1767087000', '/xtshop/password_double_opt.php')

[XT SQL Error]