Delete row ('2517', '20724') from daily_volatility

ticker_id 2517
day 20724
implied_open 0.4428987694722125
implied_high 0.4667105312717938
implied_low 0.43337406475238
implied_close 0.4571858265519613
historical_open 0.3206650589010284
historical_high 0.3206650589010284
historical_low 0.3206650589010284
historical_close 0.3206650589010284
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