Delete row ('2687', '20396') from daily_volatility

ticker_id 2687
day 20396
implied_open 0.6889536414012194
implied_high 0.7111779524141619
implied_low 0.6730791335348318
implied_close 0.6746665843214706
historical_open 0.7984877456792935
historical_high 0.7984877456792935
historical_low 0.7984877456792935
historical_close 0.7984877456792935
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