If the imam innovates in the prayer and another takes his place; does he build upon his prayer or start the prayer from the beginning?

Question:
May Allah bless you. One of the brothers says: I am a student at the Islamic University in al-Madinah al-Munawwarah. He says: If the imam innovates in the prayer, is it permissible for him to bring forward another person to complete the prayer? And does the second person build upon the first person's prayer?

Answer:
This is a point of disagreement among the scholars, and the safest course is that he starts the prayer anew. Yes.