In Andhra Pradesh, one District Collector cum Chairman of Dist.Scheduled caste coop. society allotted some land to landless SC women and the copy orders of the allotment of lands to the beneficiaries sent to the Sub Registrar concerned instructing not to register the said lands. But they were not notified as required under Assigned lands Act. So the subregistrar did not register the documents presented by the allottes. But the parties approached the court and on the court directions, the Subregistrar registered the documents. But the Director of SC coop Society is requesting to cancel the registered deeds as the lands of the said documents are assigned lands. Hence what is the procedure to cancel the registered documents?