1 in 
In the main text we give the unambiguous version of A, in which the entire 2nd half of the bar is marked as a repetition of the 1st one. The version is somewhat confirmed by an analogous figure in the melodically and harmonically similar bar 24. As far as the sound is concerned, the version of FE (→GE,EE) is perfect, so it could be a result of Chopin's proofreading, yet possible traces of performing this correction are questionable.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Terzverschreibung error, Authentic corrections of FE
notation: Pitch