Dear
@Sandeep Konchada If broker XYZ don't let you sell in preopen
Then Add Balance to your Trading Account. (For Margin)
Then Short Sell (select Intraday) IDEA.
Later after 10 :
1) If ISIN same (new and OLD) covert short sold INTRADAY to DELIVERY
2) If ISIN different: Settle Intraday and Sell new ISIN Delivery.
the price wont be much different.
(Agar price alag ho to muje kuch na kehna. This advice is FREE and a workaround)