问题甲欲购买乙名下一宗土地,但资金尚未筹齐,经双方初步协商,乙按甲的要求,先将该宗土地的权利证书交由甲保管,待其筹集好资金,双方再一同办理该宗土地的转移登记。后乙又与他人达成购买意向,便以原土地权属证书遗失为由,向登记机关申请补发。对此登记机构应当如何处理? Problem A wants to buy the next piece of land under the name of B, but the funds have not yet been raised. After preliminary negotiation between the two parties, Party B shall, according to the requirements of Party A, first hand over the certificate of rights of the land to Party A for collection of funds. Handle the transfer of registration of the land. After B and others reached a purchase intention, they will be the original land ownership certificate on the grounds of loss, to the registration authority to apply for replacement. How should this register handle?