Delete row ('697', '20375') from daily_volatility

ticker_id 697
day 20375
implied_open 0.2444674211423682
implied_high 0.2603419290087557
implied_low 0.2444674211423682
implied_close 0.2508172242889232
historical_open 0.1904940943966505
historical_high 0.1904940943966505
historical_low 0.1904940943966505
historical_close 0.1904940943966505
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