Delete row ('2661', '20438') from daily_volatility

ticker_id 2661
day 20438
implied_open 0.4778226867782651
implied_high 0.5000469977912076
implied_low 0.4730603344183488
implied_close 0.4809975883515426
historical_open 0.5206838580175115
historical_high 0.5206838580175115
historical_low 0.5206838580175115
historical_close 0.5206838580175115
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