If one prays the witr and then learns of the sighting of the Ramadan crescent, is it permissible for him to pray the night prayer?

The questioner : Shaykh, if you would be so kind, I would like to ask you. I prayed the witr, one rak'ah, and I completed it with a single rak'ah. I did not have in my mind that tomorrow would be Ramadan, or perhaps it was due to forgetfulness. If this is confirmed, is it possible for me to pray, or only two rak'ahs?

The Shaykh : No, you can pray. In this case, in this situation.

The questioner : It is possible, yes.

The Shaykh : Yes, exactly.

The questioner : May Allah reward you with good.

The Shaykh : May Allah preserve you.

The questioner : Do you advise us about something?

The Shaykh : May you be safe. My greetings to everyone, especially my brother Muhammad.

The questioner : May Allah keep you safe and bless you. Peace be upon you.

The Shaykh : And upon you peace. Abu Layli sends his greetings to you.

The questioner : And upon him peace.

The Shaykh : And he sends his greetings to Muhammad al-Khatib as well.

The questioner : And upon him peace.

The Shaykh : Welcome.

The questioner: Peace be upon you.

The Shaykh : And upon you be peace, and the mercy of Allah and His blessings.

The Shaykh: Yes.