There are many reasons you may need to duplicate a release, from varying content per territory to creating radio edits for the streaming services.
You can duplicate a release by using the "Copy" tool which can be found at the top of your Mix Details page.
To access the tool, go to Release Management -> Release List -> Select the release you wish to copy -> Click "Copy" in the icon menu.
You will then be prompted to enter a new catalogue number, this does need to be unique, however, if you are creating a duplicate for streaming etc, you can use the same catalogue number with an S on the end. If you use a similar catalogue number, you can easily search for your releases in the system.
Then click Copy -> Go to release
You will now be presented with a duplicate release which is in Draft and editable.
IMPORTANT: If you are using different audio for this copied release i.e. a radio edit, you will need to delete the tracks and create the tracks by clicking the "New Mix" button in the top icon menu.
All of the release level data such as artwork, description and credits will still remain.
For more information on best practices regarding streaming, please read this article.