The physical aspect of salvation is already finished. What I have fulfilled now is the spiritual component of salvation. I do not need to be crucified again. The physical and spiritual are now fulfilled and they are fused together in the Appointed Son.
“For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:”1 Peter 3:18