Duplicating the file would definitely be a solution, but this means you will lose version history and comments from the original file if there were any.
In short, the problem here is the following:
- The file was in a team with other editors.
- The file was moved by one of the editors to another team or their drafts, so you can’t edit it anymore.
So if you could find who from your team moved the file and get them to move it back, you would be able to continue editing the original file. If they can find it by name and “show in project”, they would be able to move it back to your team from that project/drafts folder.
If you are fine with duplicating it and losing comments/version history, that’s a fine option as well. Also you may want to share this issue with Figma support team via the support request form as this is something that has to be improved in my opinion.