On the 3rd beat of the bar A does not have flats lowering c1(2) to c
1(2), which is Chopin's patent oversight: the A minor key is valid already from bar 37 and in the discussed bar it was confirmed by a 
before the top most note of the passage in the 1st half of the bar. The sign in the R.H. was added already in GE (→FE→EE), whereas the in the L.H. was added only in GE2.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Editorial revisions
issues: Accidentals in different octaves, GE revisions, Omission of current key accidentals, Errors of A, Errors repeated in GE, Errors repeated in FE, Errors repeated in EE
notation: Pitch