Delete row ('1338', '20690') from daily_volatility

ticker_id 1338
day 20690
implied_open 0.1730321357436242
implied_high 0.174619586530263
implied_low 0.168269783383708
implied_close 0.168269783383708
historical_open 0.1444580215841267
historical_high 0.1444580215841267
historical_low 0.1444580215841267
historical_close 0.1444580215841267
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