Delete row ('2604', '20508') from daily_volatility

ticker_id 2604
day 20508
implied_open 0.277803887661782
implied_high 0.284153690808337
implied_low 0.2539921258622007
implied_close 0.2555795766488395
historical_open 0.2666917321553107
historical_high 0.2666917321553107
historical_low 0.2666917321553107
historical_close 0.2666917321553107
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