We are using TFS 2013. Now and then we need to move a PBI from a sprint backlog to the product backlog. The usual reasons are for an erroneous commitment, or it is an unfinished story which needs to be postponed, not carried forward.
Our problem is that when we drag the PBI back to the product backlog, the iteration is set to "X" when we want it to be set to our current release path, "X/V1". All of our sprint iteration paths are "X/V1/SPRINTS/nn".
(I checked the answers to How to UnCommit to a PBI, but they are ultimately not relevant to the issue of the resulting iteration path.)