Delete row ('1540', '20734') from daily_volatility

ticker_id 1540
day 20734
implied_open 0.6984783461210519
implied_high 0.769913631519796
implied_low 0.6984783461210519
implied_close 0.7461018697202146
historical_open 0.4428987694722125
historical_high 0.4428987694722125
historical_low 0.4428987694722125
historical_close 0.4428987694722125
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