What does 2 Kings 14:6 mean?

But he didn't kill their children. He followed what's written in the Law of Moses: 'Parents shouldn't be put to death for their children, and children shouldn't be put to death for their parents. Everyone dies for their own crime.' 2 Kings 14:6 - Modern Text Bible

(Amaziah obeys the law by not punishing the murderers' families, showing respect for God's justice.)