question #2 Sahih Muslim 677a, Book 5, Hadith 378 : How does the concept of abrogation apply to Quranic verses, as seen in the context of the verse revealed about those killed at Bi’r Ma’una?

Allah the Exalted and Great revealed (a verse) regarding those who were killed at Bi’r Ma’una, and we recited it, till it was abrogated later on (and the verse was like this):, convey to it our people the tidings that we have met our Lord, and He was pleased with us and we were pleased with Him”.