In the final part of the roulade (starting from c2), there are no accidentals in A (→FE). The patent inaccuracy was corrected in FC (→GE) and EE by adding the necessary naturals before b2 and b3.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, Fontana's revisions, Inaccuracies in A
notation: Pitch