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Source:
p. 1, b. 1-19
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Prezentacja
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Before the R.H. penultimate quaver Chopin wrote in A a cautionary 
which he crossed out after having checked it was not essential. This proves the intended pitch to be c
-c1 here. Therefore, the EE version is arbitrary – the reviser repeated here his amendment from the previous bar where he added (rightly there) naturals rising c-c1 to c-c1. We add cautionary flats in the main text here as GE2 already has done.
Compare the passage in the sources»
category imprint: Differences between sources; Editorial revisions
issues: EE revisions, Errors in EE, GE revisions, Cautionary accidentals, Deletions in A
notation: Pitch
Missing markers on sources:
A, FC, FE1, FE2, FED, FEJ, FES, FESch, GE2, GE1, GE3, EE1, EE2, EE1a