Ruling on making up fasts for one who breaks a voluntary fast

If a person breaks a voluntary fast without an excuse, does he have to make it up, O Shaykh?
Answer: He does not have to make it up, but it is recommended that he do so. If he intended to fast on Mondays and Thursdays and then broke his fast without an excuse, there is no blame on him. However, if he makes it up, that is better. Perhaps a guest came to him on Monday, or the heat became intense and he broke his fast; there is no blame, praise be to Allah. (The volunteer is the master of his own soul.) It is not obligatory, but the best for him, if it is easy for him to make it up, is to do so. Yes.