Gift deed

1) I was gifted a house part by Gift deed of conveyance registered by court of law by my elder sister 2) Please note that at Mother deed, there was a condition that any transfer/ sale/gift should be intimated to owners of other part of property before such act. 3) But at the time of making or before making or registering the gift deed, my lawyer did not give any importance to take permission or intimation as per Mother deed 4) As per advocate version who registered my deed that " As it is a Gift Deed , there are no condition applied for such gift deed " Now other owners of other part of house property raised objection that,-- how my doner has gifted her part to me without intimating them. They have asked to cancel the gift deed. At present whenever I intended to sell that property for arranging my daughters marrige then they are raising objections and treating like this. At this moment I want your kind advice. The donar is no more right now. The gift deed was registered in the year 2002. Is Gift deed be really free from any condition. Was it necessary to follow the condition of Mother deed? At this stage what should I do?