If you are the author of the discussion/document or if you have admin permissions you will be able to move the community asset from one place to another:
Go to the right side Actions menu and click Move
A window will come up, start typing the name of the place where you would like to post the community asset
Choose the right one and click Yes - move it here
The file will stop existing in the current place and will be stored in its new location.
You might have to remove existing comments/inline comments from the publication, if you don´t want the new audience to have access to them
Note: URLs do not change.
