What is the obligation of one who says the closing salam in error before the end of the prayer?

The Shaykh : The Prophet (peace and blessings be upon him), in order to gather the people who had left, ordered the call to prayer to be made again, or the second call, or I am uncertain now whether he ordered both together or only the second call. At the very least, he ordered the second call. So the people gathered, and he prayed one unit of prayer and performed the prostration for forgetfulness. This is the recommended practice. If a person says the salam in error and leaves, and then remembers and wants to return to complete his prayer, he should make the call to prayer and the second call, because this is the principle, as if this were a new prayer, even though it is a completion of the first prayer. This is what I intended when I told him that he had followed the recommended practice. As for him, he must assess his own situation: is he at the level of a scholar qualified to derive rulings, or one who follows a scholar without knowing his evidence? The one who follows a scholar without knowing his evidence who asked a scholar and he gave him a ruling in error, or he exercised independent legal reasoning on his own and fell into this error. I have previously answered regarding all these possibilities.