Delete row ('697', '20285') from daily_volatility

ticker_id 697
day 20285
implied_open 0.271454084515227
implied_high 0.2936783955281695
implied_low 0.265104281368672
implied_close 0.2682791829419495
historical_open 0.2127184054095931
historical_high 0.2127184054095931
historical_low 0.2127184054095931
historical_close 0.2127184054095931
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