Any time you reuse a song you've licensed before, you'll need a new license to go with it! You can easily do this by navigating to the original project, selecting the "Licenses" tab, expanding that license, and clicking "Re-license". This will allow you to create a new license for that song within the same project! If you want to create a license for a song you've already used but don't want it to live in the same project, simply head to that song's page and click the "License" button.
▫️