When Messiah paid the price for the sin of His people He paid the price for all their sin. Past, present and future.
"Blessed is the man to whom Yah Veh will not impute sin."
I should add that this is not simply a doctrine based on scripture. This is an absolute fact. The blessedness of this continual experience is above and beyond anything imaginable. It has to be experienced before it can be comprehended.
To the praise of the glory of His grace and amen.