The main reason why you'd want to re-upload a release is because you added the wrong metadata and your release looks incorrect on stores and platforms.

Usually, you can change your release's metadata without having to take it down and re-upload. See how here.

The only real reason you'd need to take down a release and re-upload is if you forgot to upload tracks to your release (eg. you distributed an album and forgot to add a song to the album release).

If this is the case and you need to takedown your song, please contact our support and we can help.