Alice.get_instrument_by_symbol() showing error for INDICES while not for NSE scrips

I’m facing error while getting instruments of NIFTY and BANK NIFTY while not getting issue for NSE equities while trying to access in jupyter notebook. ALL the contract master have been downloaded properly.However getting error while getting the INDICES instrument

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Mismatch between API and Indices.csv. You can do workaround by updating the header of the file as shown above.

Downloaded INdices.csv has Exch, Symbol, Token … convert the upper case to lower case…

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Kindly try to re-download the contract master.