Perlindungan hukum terhadap pemegang hak tanggungan akibat pembatalan akta pemberian hak tanggungan: Studi Putusan Pengadilan Negeri Bekasi Nomor 645/Pdt.G/2021/PN Bks = Legal protection for holders of dependent rights due to the cancellation of the deed of grant of dependent rights: Study of Bekasi District Court Decision Number 645/Pdt.G/2021/PN Bks