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', '0h9lmlocr5u4f5mso17nnrghc2', '216.73.216.9', '1758188473', '1758188473', '/product_info.php?XTCsid=5452c15f57f0ea9ce022f9dc9cfaa045&info=p14_65-drinking-cups-1-2-Liter.html')

[XT SQL Error]