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', 'ee8f11faa0a6143540f42c5279dbea37', '216.73.216.213', '1767296817', '1767296817', '/shop/newsletter.php')

[XT SQL Error]