Is Naskh and Mansukh (the doctrine of abrogation in Islamic law) a belief that must be held, or is it a matter of scholarly disagreement, such that one who denies it is not considered an apostate?

The people of all the revealed laws have agreed on the permissibility of abrogation (naskh) intellectually and its occurrence legislatively. However, the Jews and a group of later Muslims denied it. The texts of the scholars confirm that there is a consensus on its occurrence in the Qur'an and Sunnah, and that whoever denies it has contradicted the Qur'an, Sunnah, and consensus. As for the ruling on one who denies the occurrence of abrogation, the scholars have not deemed him an infidel; rather, they have explicitly stated his Islam, because interpretation and ignorance are among the impediments to declaring someone an infidel.