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b. 44-46

composition: Op. 28 No. 17, Prelude in A♭ major

..

In A (→FC,FE) accidentals were inserted very inaccurately – in total, 4 sharps and 12 naturals are missing – which, however, does not impede the determination of the correct text. Accidentals were being added in GE and EE, although it is only in EE2 that the notation is totally correct. The naturals before the b-b1 octave in b. 44 were also added in FED.
Interestingly enough, the notation of FCI is more accurate than the one of A – only one  and 5 naturals are missing.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Annotations in FED , Accidentals in different octaves , Errors in GE , GE revisions , Omission of current key accidentals , Inaccuracies in A , Errors repeated in FE , Errors repeated in EE

b. 44

composition: Op. 28 No. 17, Prelude in A♭ major

..

The b notes were initially repeated on the 5th and 6th quavers, which is proven by them having been crossed out (it can be seen in A).

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A

b. 45

composition: Op. 28 No. 17, Prelude in A♭ major

..

In FCI the chord on the 5th quaver is the same as the adjacent ones.

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes

b. 46

composition: Op. 28 No. 17, Prelude in A♭ major

..

FE overlooked the  before the minim at the beginning of the bar (g2). The accidental was supplemented in EE and FED.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED

b. 47

composition: Op. 28 No. 17, Prelude in A♭ major

..

At the beginning of the bar FCI includes a chord containing both the g2 melodic note (not tied) and the continuation of the accompanying voices – g1-b1-e2.

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes , Main-line changes