The three-note chord in FE is the original version, which is proved by the visible deletion of the b
1 note in GC. At the time of introducing this correction, Chopin did not check the notation of the accidentals – the 
overlooked on the 2nd beat of the bar was added only in GE.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Errors resulting from corrections, GE revisions, Authentic corrections in GC
notation: Pitch