Delete row ('697', '20417') from daily_volatility

ticker_id 697
day 20417
implied_open 0.2016062499031218
implied_high 0.2095435038363156
implied_low 0.1936689959699281
implied_close 0.1952564467565668
historical_open 0.2000187991164831
historical_high 0.2000187991164831
historical_low 0.2000187991164831
historical_close 0.2000187991164831
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