Reorganize conversations into more appropriate Topics or newly-created Topics.
Go to Discussions.
Select Discussions from the Tool Menu of your site.
Click on a Topic.
Select a conversation and then click Move Thread(s).
Configure the details of the move.
Optionally activate Leave reminder about the move in the old topic to notify site participants of the change.
Optionally use the Filter Topics area to locate a new destination Topic for the thread. This feature is especially useful if your Discussions tool is highly populated with Topics.
In the Topics list, choose a new Topic to which you wish to move the thread.