How Can Those Already Dead in Sins Die in Christ Again?

And you He made alive, who were dead in trespasses and sins (Eph 2:1 NKJ)

In Christ we die to sin.

How shall we who died to sin live any longer in it? (Rom 6:2 NKJ)

Christ also did not die in sins; for He is the sinless One. But, He died to sin, i.e. to the condemning power of sin that held over the old creation.

knowing that Christ, having been raised from the dead, dies no more. Death no longer has dominion over Him. For the death that He died, He died to sin once for all; but the life that He lives, He lives to God. (Rom 6:9-10 NKJ)

Therefore, we are called to reckon ourselves "to be dead indeed to sin, but alive to God in Christ Jesus our Lord." (Rom 6:11 NKJ)

For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection (Rom 6:5 NKJ)

Thus, in Christ, by faith in Him, those who are dead in sins become dead to sin so that they can live to God.

To be dead in sins means to be separated from the life of God because of our sins. But, Christ Himself is Life and in Him is Eternal Life. Therefore, death could never touch Him. Death could not hold Him. By faith in Christ one is made alive in Christ, so that one is now dead to sin and alive to God.