FE1 is lacking naturals lowering f to f and d1 to d1. They were completed both in FE2 (two accidentals) and in EE (three). Also in GE the spaces between the notes clearly indicate that the accidentals were added only during proofing/revision.
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category imprint: Differences between sources
issues: EE revisions, Accidentals in different octaves, Inaccuracies in FE, GE revisions, Omission of current key accidentals, FE revisions
notation: Pitch