Is it obligatory for the one performing 'Umrah in Ramadan to combine it with Hajj?

The questioner: Allahu Akbar, yes, my Shaykh, my Shaykh, there is my friend Abu 'Ubaydah al-Ma'zuzi from Morocco in Marrakesh.

The Shaykh : Yes, indeed.

The questioner: Do you know him, my Shaykh?

The Shaykh: I know him well, the reciter.

The questioner: Yes, he sends his salam to you, my Shaykh, Abu 'Ubaydah.

The Shaykh: And salam to him.

The questioner: He loves you for the sake of Allah greatly and hopes that you will attend the Hajj this year, because he is currently in al-Madinah.

The Shaykh: When did you see him?

The questioner: He is now... he is a Shaykh.

The Shaykh: Okay, send him salam then.

The questioner: I am studying in al-Madinah.

The Shaykh: Send him salam.

The questioner: May Allah keep you safe, my Shaykh.

The Shaykh : May Allah keep you safe.

The questioner: And he has a question. He says: My Shaykh, a man who is awake (not in a state of ihram) performed 'Umrah in Ramadan.

The Shaykh : Yes.

The questioner: A man has a question. He says: A man who is awake (not in a state of ihram) performed 'Umrah in Ramadan. From Makkah to Hajj, so does he have to enter ihram for Hajj alone (ifrad), or is it obligatory for him to combine them (tamattu')?

The Shaykh: Ramadan is not one of the months of Hajj.

The questioner: Yes, my...