Description
When you select the Product Type and click copy the option there is a DB error:
MySQL Error: Column 'property_order' cannot be null
Solution
http://www.viart.com/downloads/5.admin_products_copy_properties.php.zip
Download the file above and extract 'admin_products_copy_properties.php' in the 'admin' folder replacing existing file. Please do not forget to make a backup copy of the current file in case something goes wrong.