If witr has already been prayed, what is correct about tarawih?

Qiyam Ramadan: Tarawih, Qur’an Recitation, and Witr Congregation

• No voluntary prayer is ever allowed after witr
• Fajr becomes immediately obligatory after witr
• Witr invalidates every tarawih rakah
• Tarawih may still be offered later in the post-Isha period