How to challenge uneven partition

Your grandmother is required to file partition suit along with challenging the partition deed in competent civil court.....

Nothing is happened, now also your grand mother can file a suit for partition.  She can also aver about the recent partition which is unequal.

Dear Rajeev and Mahesh,

Thanks for the replay, is there any timeline to file a case ( is it required to file a case with in one week registration?) also they have mentioned point in partition deed that nobody including my grand mother is allowed to challenge or file a suit against the partition so is it valid if my grand mother files a suit?

For partition there is no limitation but to challenge the partition deed,

you have to challenge it within 3 years... Though there is condition mentioned in the deed itself, still you can challenge it, but you have to plead the reality... or mischeif of brothers etc.