פירוש על עבודה זרה 111:6

In this version of the baraita, R. Akiva clearly states that it is not considered wine until it has been removed from the vat and put into casks.

The Talmud now accepts this second baraita and reads the first baraita in its light. R. Akiva indeed holds that the liquid is not wine until it is put into the cask and there skimmed.