Unable to fetch NIFTY option quote

{'message': '', 'code': 200, 'd': [{'n': 'NSE:NIFTY2542424100CE', 'v': {'n': 'NSE:NIFTY2542424100CE', 'errmsg': 'Please provide a valid symbol', 'code': -300, 's': 'error'}, 's': 'ok'}], 's': 'ok'}

Am I missing something in the symbol?

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