Delete row ('1670', '20608') from daily_volatility

ticker_id 1670
day 20608
implied_open 0.8334116629853461
implied_high 0.8365865645586236
implied_low 0.7667387299465185
implied_close 0.776263434666351
historical_open 0.6905410921878581
historical_high 0.6905410921878581
historical_low 0.6905410921878581
historical_close 0.6905410921878581
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