If the Mu'adhdhin makes a mistake while calling the adhan, does he have to start over from the beginning?

If the Mu'adhdhin makes a mistake while calling the adhan,and someone subhanallah him, does he have to start over from the beginning? And, can you inform me on what school did you get your fiqh from or what haddith did you use to get your answer. Thank you. Assalamu Alaykum.