We've got a project that has a project plan attached that has become unusable although time has been reported against the tasks in the plan for some time.
The user wants to start over basically and create a new plan that replaces the old one and start reporting time in the new plan moving forward.
If a new plan is created, then do we just leave the old one alone and start posting time to the new plan?
Should we ever consider deleting the old plan or would that cause issues? If so, what? If the old plan was deleted, would you lose historical time that was posted?