What is the ruling regarding someone who, out of forgetfulness, prayed Shafa and Witr twice in the same night: once while traveling, combining it with Maghrib and Isha, and then again after midnight?

Whoever prays Witr and then wishes to perform a supererogatory prayer should not pray Witr again, based on the Prophet's (peace be upon him) saying: "There are no two Witrs in one night." Some scholars hold the view of nullifying the first Witr with one rak'ah, then praying as much as one wishes, and then concluding with Witr. If you prayed Witr twice out of ignorance, there is no sin upon you.