Delete row ('6', '20427') from daily_volatility

ticker_id 6
day 20427
implied_open 0.8286493106254299
implied_high 0.9191340054638388
implied_low 0.8286493106254299
implied_close 0.8889724405177025
historical_open 1.142964566379903
historical_high 1.142964566379903
historical_low 1.142964566379903
historical_close 1.142964566379903
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