There is no 
before the top note of the last octave in the L.H. – undoubtedly a g – in GC and FE (→EE1). This patent inaccuracy was revised in GE and EE2, however, in GE the was misplaced in front of f in the R.H. (in the sources the bottom notes of the last two octaves in the R.H. are written on the bottom stave).
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, Inaccuracies in FE, Errors in GE, GE revisions, Omission of current key accidentals, Inaccuracies in GC
notation: Pitch