Initially, the 1st group of semiquavers in A was 
. Chopin deleted it and wrote the final version below. It seems that he did not check the influence of the change on the notation of the subsequent part of the bar – there is no 
before the 3rd note in the 2nd group of semiquavers, while in the 3rd group there remains a 
before g, which is however justified also as a cautionary accidental, yet it was written probably due to g in the original version.
Compare the passage in the sources »
category imprint: Corrections & alterations
issues: Corrections in A, Errors resulting from corrections, Cautionary accidentals
notation: Pitch