Should the Duha prayer be repeated if it was prayed inadvertently during a prohibited time, and the worshipper remembered this after finishing the prayer?

The time for Duha prayer begins when the sun has risen to the height of a spear (approximately fifteen minutes after sunrise) and extends until just before zawal (meridian). If one prays it before its time, the prayer is not valid, and they must repeat it to attain its virtue. Likewise, voluntary prayers that are not tied to a specific reason are not valid during the prohibited times, even if the worshipper is unaware of the ruling.