Delete row ('697', '20297') from daily_volatility

ticker_id 697
day 20297
implied_open 0.2047811514763993
implied_high 0.2143058561962319
implied_low 0.2031937006897606
implied_close 0.2095435038363156
historical_open 0.2349427164225357
historical_high 0.2349427164225357
historical_low 0.2349427164225357
historical_close 0.2349427164225357
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