Mistakes In Partnership Deed

Agriculture land is purchased by A & B and together they have decided to start a firm and executed a partnership deed and as part of the deed they have provided the land to the firm and applied for NALA and started running the firm. Now one of the partners let's say A is willing sell his share to B. One issue while executing the partnership deed is that it is registered before the sale deed of the land. Let's say A&B have paid for land in May and sale deed registration in the name of A&B in July. Partnership deed and land provided to the firm are registered in the month of June. Now, one of the partners wants to leave the firm - What are the implications of still using this partnership deed. Is it Void? How to rectify now so that there will be not be any issues from "A" in the future.