The version of FE1 is almost certainly a mistake by Chopin, which is proven by the compliant version of AI and FE2 (→EE), proofread by Chopin. The mistake was most probably caused by the fact that in [A] the notation with a 5-sharp key signature (as in AI) was replaced with the notation with a 3-sharp key signature. In the discussed four-bar section, kept in the key of C
major, it was necessary to add sharps to d and a notes, which Chopin apparently did not do, since these are the accidentals that are missing in FE1 (see also the last note in the next bar).
Compare the passage in the sources »
category imprint: Differences between sources; Editorial revisions
issues: Errors in FE, Errors resulting from corrections, GE revisions, Omission of current key accidentals, Authentic corrections of FE
notation: Pitch