Can you carry forward score from previous round?

Summary

If you score round 1 requirements and create round 2 with new requirements, can you keep the scores from round 1?

Content

We are implementing sourcing and have a question about rounds.  We have some RFPs where the first round the suppliers respond to all of the requirements and submit their proposals.  These get scored, and the top suppliers will move to a 2nd round.  New internal requirements are added for interviews.  We don't need suppliers to re-submit their proposals but it doesn't seem like there is any way to prevent this other than deleting the requirements from the 1st round before starting the 2nd.  But the business users want the scores from the 1st round retained so they can be aggregated