Illegal mutation by false Deed .

Some one grabbed a land by a fully false deed e.g. His purchased land Dag No. 322 & four boundaries are given same as dag No. of 321 & mutation is done on dag No. 332 on the basis of the same deed where mentioned dag is 322 . Now the question how to mutation is done by the land record department on the basis of a totally false deed & the person is staying on dag No 332 on the basis of illegal mutation . Now what should to do because dag No 332 is mine