Buy price is missing in Positions/MTF Positions api

Developer API
,
1

Hi there

Please have a look at below json response that I am receiving after exiting delivery position.

   {
        "exchange": "NSE",
        "multiplier": 1.0,
        "value": 0.0,
        "pnl": 351.75,
        "product": "MTF",
        "instrument_token": "NSE_EQ|INE733E01010",
        "average_price": 0.0,
        "buy_value": 0.0,
        "overnight_quantity": 35,
        "day_buy_value": 0.0,
        "day_buy_price": 0.0,
        "overnight_buy_amount": 0.0,
        "overnight_buy_quantity": 35,
        "day_buy_quantity": 0,
        "day_sell_value": 11991.0,
        "day_sell_price": 342.6,
        "overnight_sell_amount": 0.0,
        "overnight_sell_quantity": 0,
        "day_sell_quantity": 35,
        "quantity": 0,
        "last_price": 343.2,
        "unrealised": 0.0,
        "realised": 351.75,
        "sell_value": 11991.0,
        "trading_symbol": "NTPC",
        "close_price": 337.45,
        "buy_price": 0.0,
        "sell_price": 342.6
    }

Can you please tell me why buy price is getting zero(0) after selling?

@Ketan @MohitGolecha