You can use a file’s activity history to recover a deleted item for the file, such as deleted issues.
Click Files in the side panel. (If Files is not shown, see Customize the Side Panel for details on how to add it.)
Open a file.
In the Versions panel, select the version you want to view activity for. If you don’t select a version, the activity for the latest version of the file will be shown.
In the Activity panel, click History. The activity history is shown with the most recent activity first.
Click Recover
beside the item you want to recover.
You receive a confirmation message that the item has been recovered.