Under Deuteronomy 24:16, a person was to be put to death for whose sin?

Answer: His own

"Fathers shall not be put to death for their children, nor children for their fathers; each is to die for his own sin."

“Fathers shall not be put to death for their children, nor children for their fathers; each is to die for his own sin.”— Deuteronomy 24:16 (BSB)