The version without flats, featured in A (→FE→EE), is perfectly correct from the musical point of view. In spite of this, it is almost certain that Chopin forgot to return a
1-a2 here; as a result, it is the version of GE that is compliant with his intention. It is revealed by the comparison with the prototype of this phrase in bar 15, in which the sound of a1-a2 was unequivocally confirmed by Chopin.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Omissions to cancel alteration, Errors of A
notation: Pitch