If answers in a project is lost due to some reason (maybe reimport or maybe bulk answering), there should be an option for the Project Primary Contact to restore the answers in the project. It can be like a rollback to a certain time.
This access should be given only to the Primary Contact of the project and no one else.
There are many cases where users are losing their answers because of their carelessness/lack of awareness and they come to us for restoring. This wastes a lot of time for them.