Delete row ('697', '20287') from daily_volatility

ticker_id 697
day 20287
implied_open 0.2746289860885045
implied_high 0.2746289860885045
implied_low 0.2301803640626194
implied_close 0.2381176179958132
historical_open 0.2381176179958132
historical_high 0.2381176179958132
historical_low 0.2381176179958132
historical_close 0.2381176179958132
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