Delete row ('1390', '20657') from daily_volatility

ticker_id 1390
day 20657
implied_open 0.9794571353561115
implied_high 0.9858069385026665
implied_low 0.9381834149035039
implied_close 0.9508830211966139
historical_open 0.9207214562504776
historical_high 0.9207214562504776
historical_low 0.9207214562504776
historical_close 0.9207214562504776
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