The g1 crotchet, struck in bar 159 and sustained as a minim in bar 160, was added by Chopin in the last proofreading of FE (→EE). This kind of diversification of subsequent appearances of repeating musical ideas belonged to Chopin's favourite composer tricks.
The proofreading also embraced a change of the graphic layout of the text – the 3rd quaver in the R.H. was moved to the upper stave.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Authentic corrections of FE
notation: Pitch