Op. 2, Variations in B♭ major
Op. 10, 12 Etudes
Op. 11, Concerto in E minor
Op. 21, Concerto in F minor
Op. 22, Polonaise in E♭ major
Op. 24, 4 Mazurkas
Op. 25, 12 Etudes
Op. 26, 2 Polonaises
Op. 27, 2 Nocturnes
Op. 28, 24 Preludes
Op. 30, 4 Mazurkas
Op. 35, Sonata in B♭ minor
Op. 50, 3 Mazurkas
Op. 63, 3 Mazurkas
Op. 64, 3 Waltzes
Op. 21, Concerto in F minor, Mvt I
All sources have a 
before e
2, a sign that we omit in the main text as an unjustified cautionary accidental in this context. Perhaps Chopin felt the need to mark the difference with respect to the previous half-bar figure, in which there is a d2 in this place – it would be another argument confirming the fact that the absence of 
before this d2 in A (→GE) is an oversight.
Compare the passage in the sources »
category imprint: Editorial revisions
issues: Cautionary accidentals
notation: Pitch