What did peter want to do about the vacancy by Judas?

Peter wanted to address the vacancy left by Judas Iscariot's betrayal and subsequent death by proposing that the group of apostles choose a replacement. He emphasized the importance of selecting someone who had been with them from the beginning of Jesus' ministry. This decision was seen as essential to maintain the integrity and leadership of the apostles as they continued their mission. Ultimately, they cast lots to select Matthias as Judas's successor.