Delete row ('6', '20417') from daily_volatility

ticker_id 6
day 20417
implied_open 1.003268897155693
implied_high 1.063592027047966
implied_low 0.9746947829961953
implied_close 0.9810445861427503
historical_open 1.192175540765705
historical_high 1.192175540765705
historical_low 1.192175540765705
historical_close 1.192175540765705
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