Division of family property

Sir, my father has 04 brothers a resident of east champaran in bihar state. my father is youngest one and the oldest one has expired 20 years ago.we have some immovable property, some in the name of my great grand father some in the name of grand father some in the name of elder brother and a little in the name of my father.all these property were acquired way back in 1970-1990.now after death of my elder uncle there 02 sons are claiming that the land on the name of there father belong to them and the will not give share in it. a partition deed with mutual consent was prepared by local panchayat and them was submitted to Cirlcle officer for approval but by cousin brother(younger son of my deceased uncle) has submitted a objection to circle officer regarding this partition then it was put on hold by CO. Now what are the legal options are available to us to either get this partatoin deed approved by CO. is there any right to my father in the property of my deceased uncle, if partition is done through court what time will it take.