Delete row ('1876', '20508') from daily_volatility

ticker_id 1876
day 20508
implied_open 0.7715010823064347
implied_high 0.776263434666351
implied_low 0.7397520665736596
implied_close 0.7730885330930735
historical_open 0.5381458166705377
historical_high 0.5381458166705377
historical_low 0.5381458166705377
historical_close 0.5381458166705377
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