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', '2hhi7r3eei98280rjdifnsj3b2', '216.73.216.121', '1761862736', '1761862736', '/product_info.php?XTCsid=80c3e9fc87b53cb0d288d19ef4e9b63c&info=p8_100-Placemats.html')

[XT SQL Error]