The topic of דיינים שטעו is common in the Gemmorah. Numerous passages discuss what happens when a court gives a "wrong" ruling as a result of different mistakes, either in Halachic knowledge, common knowledge, logic or assessments.
In practically all of those cases, the verdict is Halachicly invalidated, for example, Mishnah Ksubos 11, 5:
"שׁוּם הַדַּיָּנִין שֶׁפִּחֲתוּ שְׁתוּת אוֹ הוֹסִיפוּ שְׁתוּת, מִכְרָן בָּטֵל."
"a judicial appraisal in which they subtracted a sixth or in which they added a sixth, their sale is void"
When and how (by whom) the erroneous verdict of this kind is invalidated: is it by the court itself, by another court (a greater or equal or any) or by the defendants themselves?
For example, in my quote, when and how the sale is void and by whom?