question #3 Sahih Muslim 677j, Book 5, Hadith 387 : What does the abandonment of a specific practice by the Prophet (ﷺ) indicate about its ruling in Islam?

Anas reported that the Messenger of Allah (ﷺ) observed Qunut for one month invoking curse upon some tribes of Arabia (those who were responsible for the murders in Bi’r Ma’una and Raji’), but then abandoned it.