Property legal advice

We have purchased an agriculture land in 2016. done registry & mutation , patta book is im my name & we are in posession , (also sold a part of the land ),This is in Telangana state. From a farmer F1. And this farmer was in possession for nearly about 20 years. From 2003 onwards his name is there in the Pani Copy & patta book, Before this some other person's name was there. His name was Papaya. Papaya has sold land to farmer F (in year 1984 as per the farmer). Farmer has done mutation in his name, having patta book in his name , . Now the issue is that Papaya great-grandchildren are coming and claiming that their grandfather has not sold the land. They need to make a partition among themselves and filed pettition in court And they have made us also a party. we are 12 persons who has purchased land from farmer all made party ,13 defendants , D1 is their relative (Petitioners relative on whome they are asking for partision ) , D1 is nothing to do with farmer & other land buyers , this D1 is 2nd wifes great grand children ... since then last month (june) i have received this update (Plaintiff called absent. No representation. Process not deposited against Defendants No. 2, 3, 6, 9, 10, 12 and 13 till 04:30 PM inspite of availing sufficient time. Therefore, the suit against Defendants No.2, 3,6, 9,10, 12 and 13 is dismissed. Defendant No.1 called absent). I AM D2 please legal advice and pls 1) what will happen to my land 2)how strong is the case 3)if the farmer not respond what impact will it have on me 4) if farmer lose the case what will happen to me