Understanding Isaiah 65:20 (new heaven new earth)

[Karas]

I was just Reading about the "New Heaven and New Earth" in the bible and I came to an intresting verse which state:

There shall be no more thence an infant of days, nor an old man that hath not filled his days: for the child shall die an hundred years old; but the sinner being an hundred years old shall be accursed. (Isaiah 65:20 KJV)

And NIV verson:

"Never again will there be in it
an infant who lives but a few days,
or an old man who does not live out his years;
the one who dies at a hundred
will be thought a mere child;
the one who fails to reach a hundred
will be considered accursed. (Isaiah 65:20 NIV)

From what i'm understanding from theses verses is that, once the new heaven and earth is made, we will still die but die to the max age. If you die under 100 years it will be cause you have sinned and is cursed.

Is my interpretation of this verse right?