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', '6evpp6dnhva9idj2c5n7njg7h7', '216.73.217.138', '1778822022', '1778822022', '/shop_content.php?XTCsid=903d490a11e72fb45b2507d2f3478040&coID=2')

[XT SQL Error]