Partnership deed changes and pan card

Dear all, 

Greetings !

i had a partnership firm named  "XYZ associates"  which had 3 partners and the partnership deed was not registerd and got a pan card in the name of  "XYZ associates".

Business was not started due to some reasons and not even a current account was taken using  that pan card.

Now after 3 years a new partnership deed was drafted with 2 partners and it is registerd in the same name of "XYZ associates" 

My Questions

1 ) Can i keep the Old pan card by submitting new deed under correction? 

2 ) Should i have to change the name of partnership to obtain new pan card and surrender the old pan?

please suggest the best solution

Many thanks.