بسم الله الرحمن الرحيم
Then, you shall only offer tahajjud salah. You need not repeat witr salah. Witr is offered only once during one night. It is not lawful to offer it twice. It is mentioned in hadith:
لا وتران فى ليلة
It is not lawful to offer witr twice in a single night.
Allah knows Best!
Darul Uloom Deoband