Hey aditya,

You should upload the most recent copy of your caste certificate according to JEE process. You will not be allowed to take the seat if found wrong at any process of counselling. I will suggest you to take the recently updated copy and upload it in the JEE advanced form.

Good luck !

Hi Aaditya , Cast certificate and Cast validity certificate both certificate Are not have any limitation. Once you got it, it is valid for life time. So you can upload your old cast certificate without any tension. It is safe. 

Thanks.