In Atut (→FE), there is no lowering f2 to f2. This patent inaccuracy was corrected in the remaining editions.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, GE revisions, Omission of current key accidentals, Inaccuracies in A, Errors repeated in FE
notation: Pitch