Neighbour asking for land on which we have been living for 40+ years

We have been living in our place for last 40+ years, recently some neighbors started accusing us of having more land than prescribed. Now they are saying either they will forcefully take it or they want some financial settlement. Note: 1 satak=0.01 acre land description: There were 10 plots to be sold 40+ years ago, some how the first 4 plots took some land less, and the excess land became part of other 6 plots unknowingly. After measurements few months back, these 6 plots have 0.5 satak to 1 satak more and we have 1.5 satak more.Note in this 1.5 satak there was a path(no more used) which was used to go to farms which belong to no one at that time . We have been asked to give 60% of this 1.5 satak to them or they will forcefully take all,while other 5 plot owners have been asked they can stay with their extra land.No one has legal papers to the extra land. Why it is so important to us?we have been living here for 40+ years , this land is infront of our home where we have been playing,planting plants, trees for decades. Why others want it? :this land is on the main road. Being new to this , while searching online, I found about adverse possession which gives us right to the property. Please suggest how to handle this, how can i approach legally to make this property mine.