Hi @jil_upadhyay,
Welcome to Dhan Community.
Seems you have sold shares from your holding and are trying to buy the same stock. This is not allowed as addressed here Important: Trading Limits against Credit for Sale (CFS) and Sell restrictions effective 8 May 2023.
On the other hand, if you have sold your shares and see this in your open position, do not worry. This is expected behavior as long as Sell order is executed. This will show in Open positions for that day.
Request you to please write to us at help@dhan.co with exact details so we can resolve this for you.
Hope this helps.
Regards,
Jay