Will we need all signatures to register the sale deed?

My mother and her sister inherited agricultural land from their father. Both my mother and her sister passed away almost ten years ago, and the property is now jointly held by me and my siblings, as well as my aunt’s successors. Currently, all joint holders, except for myself and two other stakeholders, are selling the property to a buyer. In the draft sale agreement, one of the clauses states: "Furthermore, it is agreed that the title deed for Vendor No. 3, 4, and 5's share of the property shall be transferred to the respective vendors' names simultaneously with the registration of the sale deed." Given that our relationship is not good with one of the joint holders, we are concerned about the possibility of needing their signature again when selling our share of the property. Could you please advise on the procedure we need to follow while registering the sale deed?