Delete row ('600', '20397') from daily_volatility

ticker_id 600
day 20397
implied_open 0.7397520665736596
implied_high 0.7524516728667696
implied_low 0.6873661906145806
implied_close 0.7064156000542456
historical_open 0.6254556099356692
historical_high 0.6254556099356692
historical_low 0.6254556099356692
historical_close 0.6254556099356692
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