YAF 2.31.5. I have just used the good old Move Topic command with the following parameters:
Leave a link to the moved topic from the original forum: On
Days to keep link to topic: 3
However, the link to the moved topic is not shown in the original place. A bug? If so, fix it in the next v2.31.7.
BTW, the list with sections to move into is a complete mess. If you have forums with subcategories, you should see this problem too.