I am currently trying to clear up a mess where a new starter has (almost) completed a change, so it's been through review/rework and is ready for deliver, but in the meantime, like most people familiar with modern SCM systems, he's just started a new activity on the same view. (and he's on leave)
I believe the solution to this is to move the new activity with its changeset to a new view and then deliver the old activity as intended.
However I have read how to "move" an activity between streams, but I can't find in the IBM docs or anywhere else how to move it with the changeset.
Now, the fallback option is to manually copy over the change and remove it from the first view. I'd rather not do this as that adds dev and review effort, but if it is the only way, then I'll do it.
You can indeed "Moving a set activity from one view/stream to different a view/stream"
But regarding "change sets", you might have to move UCM version in a change set from one activity to another, i order to empty one (change set, from one activity) to another.
Not ideal, but depending on the size of the change set, feasible.