No, you don’t have to make them up, but you have to pray in the right way after you have found out the correct ruling.

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It is leaving sins in general and it is also referring to leaving a country where a Muslim can’t practice Islam. https://www.youtube.com/watch?v=UDKH6bpiK0s

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If this Duaa is related to your recitation, thinking that it to be sunnah after reciting the Quran, this is not allowed! But if it just happened that you wanted something from Allah not related to your recitation, this is permissible.

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