Can you use prenup instead of separation agreement in VA Divorce?

May you please help me with this problem.
I have been separated with my spouse for 6 months already.
By the law of Virginia, "you are eligible for a six-month divorce ONLY if you have entered into a written separation agreement..."
But we have a prenup, that we signed before marriage. My question is : Do we need to make an separation agreement for a six-month divorce if we already have a prenup ? In other words, can you use prenup instead of separation agreement in VA Divorce?

Many Thanks!