Delete row ('40', '20390') from daily_volatility

ticker_id 40
day 20390
implied_open 0.3016156494613633
implied_high 0.3206650589010284
implied_low 0.3016156494613633
implied_close 0.3159027065411121
historical_open 0.2793913384484208
historical_high 0.2793913384484208
historical_low 0.2793913384484208
historical_close 0.2793913384484208
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