The upper note of the 4th quaver was being proofread in FE (probably from g
1 or a1). It was inaccurately implemented – the notehead is placed too high and a fragment of the 3rd ledger line is visible on its left-hand side. However, both GE and EE interpreted it as f1, which we also consider to be correct. If the changed note was g1, it is a simple correction of a mistake. However, if it was a1, like in analogous bar 34, we are dealing with a Chopinesque change of the original version, most probably due to a different continuation.
Compare the passage in the sources»
category imprint: Corrections & alterations; Source & stylistic information
issues: Authentic corrections of FE
notation: Pitch