Delete row ('12', '20091') from daily_volatility

ticker_id 12
day 20091
implied_open 0.2603419290087557
implied_high 0.2603419290087557
implied_low 0.2365301672091744
implied_close 0.2365301672091744
historical_open 0.2016062499031218
historical_high 0.2016062499031218
historical_low 0.2016062499031218
historical_close 0.2016062499031218
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