Land sold with wrong boundaries and correct survey number

Dear Sir/Madam, There are 4 heirs for an ancestral land. Out of which 2 heirs had sold the complete land with out the other heirs signature. During the registration, all the four boundaries of the sold land were mentioned wrongly and the survey number was given correctly. Is this registration valid? If valid, what kind of petition that the other 2 heirs can file on the heirs who sold the land? Do we have to include the current owner of the land(who bought the land) in the petition?