On the authority of his father, who said: The Messenger of Allah ﷺ forbade to break the coins of the Muslims current among them except for some defect.  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ تُكْسَرَ سِكَّةُ الْمُسْلِمِينَ الْجَائِزَةُ بَيْنَهُمْ إِلاَّ مِنْ بَأْسٍ