My Grandfather and his brothes purchased agricultural land 40 years ago in a village in a Maharshtra when they were in the united family. 2o years ago Grandfather his borthers got separated and this purchases land came to my grandfather's part in the family property division. My grandfather has two sons. In the undivided family my father has name on 7/12 on the other land which went to my Grandfather's brother after division. After property division they changed 7/12 records and my father's name is added to this purchased property which came to my grandfather's part, to that with my uncle.
Now within this property there was no boundry decided between three of them. My grandfather has sold his part without consulting with my father. He is saying it is his private property as he has purchased it and he can do anything with it without consulting with my father.
Is this correct? Can we take any legal action against this deal?