Delete row ('1321', '20171') from daily_volatility

ticker_id 1321
day 20171
implied_open 0.8953222436642575
implied_high 1.035017912888468
implied_low 0.7254650094939107
implied_close 0.8873849897310637
historical_open 1.023905757381997
historical_high 1.023905757381997
historical_low 1.023905757381997
historical_close 1.023905757381997
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