What is the ruling concerning 'Ali's alleged overturning of Sharih's judgment regarding inheritance between cousins?

Primary text

It is not established that 'Ali overturned Sharih's ruling concerning the inheritance between two sons of brothers, where one was also a maternal brother. If it were established, it is probable that 'Ali believed Sharih's ruling directly contradicted a clear text of the Book, specifically citing the verse regarding heirs of different degrees (Quran 4:12) after Sharih cited the verse concerning uterine heirs (Quran 8:75). Therefore, the nullification would stem from the perceived contradiction of the text, not merely a difference in Ijtihad.