Seth perverts the order of births of Cains lineage

Seth's lineage is a perversion of Cains lineage where the order of parentage is reversed for the fathers and sons listed in Cains line

Genesis 4

Cain is the father of Enoch

genesis 5

Enosh is the father of Cainan

Genesis 4

Enoch is the father of Irad

Genesis 5

Jared is the father of enoch

Genesis 4

Irad is the father of Mahujael

Genesis 5

Mahalalel Is the father of jared

Only the last pair does not reverse

Genesis 4

Methushael is the father of Lamech

Genesis 5

Methuselah is the father of lamech

What is the significance of this