So I have a firm fixed price severable contract for IT help desk support. With the contract, two positions are named as Key Personnel per the clause and are also considered essential to the contract. During contract performance, one of the key personnel positions was vacant for 2 months. During this time period, performance on the contract suffered and deliverables were not met. The government does not want to terminate the contract but wonders if we can suspend payment for the Key Personnel position during the 2 months it was vacant? Is this possible given the fact that it is a fixed price contract?