In FE1 there is no 
in front of the last quaver. As far as the melody is concerned, an f
2 would not be possible here, but taking into account analogous situations in bars 44 and 48 the omission of the accidental has to be considered the most likely version. Adequate additions were introduced into FE2 and EE. The is also in GE.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Inaccuracies in FE, Omission of current key accidentals, FE revisions
notation: Pitch