Save project plan verse history/progress?

Question

I received this question from a user. Thoughts/suggestions welcome:

Is there a way to save an existing project plan so that the verse histories (work progress) are not deleted, and make a new project plan from a base plan? I would like to not lose the verse histories. Or should I just make changes to the current plan, adding descriptions to the stages and adding tasks?

We're finished with the New Testament and Genesis, and have started on other Old Testament books. The project plan that was put in place years ago in the Advanced Paratext training course doesn't have any described stages nor tasks included.