In a duplicate set, only the primary change proposal is reviewed and applied. The duplicate change proposals are superseded by the primary change proposal, so the proposal you choose to be the primary change proposal in the set must contain the most complete information.
For example, if there are two similar change proposals, but one has been raised against a single object, and the other is a multiple change proposal, make the multiple change proposal the primary change proposal. If you make the multiple change proposal a duplicate in the set, only the object that is referenced by the primary change proposal is reviewed and applied.
The duplicate change proposals are made read-only when they are added to the duplicate set, and their status does not change throughout the review process. You can remove a duplicate change proposal from a set at any time. The change proposal becomes editable, and has the status that it had when it was added to the duplicate set.
The status of the set and any comments the review team want to make on it are recorded with the primary change proposal.