will issue

hello experts
I am a business owner at vadodara. my father died on 2002. I have 6 uncles
my grandfather wrote a will in 1991 in that will he mention about his property as per that will all property will distributed to all his 7sons equally, after that he modified his will
in 1997 again that all propert he wants to give his elder sons son(my cousin) on that will (1997) basis my cousin wants to remove all other family members names from my grandfathers property I am not comfortable with this please suggest
my grandfather died on 1999
and my grandma died before my grandfather died

please give suggestions