Brief.
We have made a fix of the 'admin_product.php' file after release 3.3 has been issued.
 
Description.
There was a DB error when creating the Duplicate product
 
Solution.
Please download an updated version of the file from here:
http://www.viart.com/downloads/admin_product-3.3.zip
Then extract the file 'admin_product.php' into the folder 'admin' of your shop replacing an existing one.
Don't forget to make a backup copy of the current file in case something goes wrong.