In bar 3 all sources feature a completely unjustified 
(cautionary?) to the first G
note. In FC a respective was also added in bar 4 (in pencil). We do not consider this accidental to be part of FC, since it was added by the reviser of GE. In addition to GE, the latter was also added in EE. In the main text we omit both accidentals.
The sharp in bar 3 must have been entered into [A] by Chopin. According to us, it could be an echo of the initial notation of bars 1-2, in which the top R.H. minim was written down as g1.
Compare the passage in the sources »
category imprint: Differences between sources; Editorial revisions; Corrections & alterations; Source & stylistic information
issues: EE revisions, GE revisions, Cautionary accidentals, Enharmonic corrections
notation: Pitch