Surat Keterangan Ganti Rugi (SKGR) sebagai Alas Kepemilikan Hak Atas Tanah dan Kekuatan Pembuktiannya Terkait Masalah Tumpang Tindih Tanah (Analisis Putusan Mahkamah Agung 591 K/PDT/2021) = Certificate of Compensation (SKGR) as a basis for ownership of land rights and the strength of evidence related to land overlapping issues (Analysis of Supreme Court Decision 591 K/PDT/2021)