Delete row ('1685', '20494') from daily_volatility

ticker_id 1685
day 20494
implied_open 0.6794289366813868
implied_high 0.6953034445477744
implied_low 0.6683167811749156
implied_close 0.6841912890413031
historical_open 0.6619669780283606
historical_high 0.6619669780283606
historical_low 0.6619669780283606
historical_close 0.6619669780283606
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