Perlindungan Hukum Bagi Ahli Waris Terhadap Peralihan Hak Atas Tanah Warisan Melalui Jual Beli Tanpa Persetujuan Seluruh Ahli Waris (Studi Putusan Mahkamah Agung Republik Indonesia Nomor 2511K/PDT/2020) = Legal Protection For the Heirs Against the Transfer of Rights to the Inheritance Land through Buying And Selling Without Approval Of All Heir (Study Ruling No. 2511K/PDT/2020)