In FE1 there are no naturals before the 5th and 7th quavers (both are necessary in the layout adopted in this edition). The signs were added in FE2. The correct text is also in EE and GE (with one natural f).
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Accidentals in different octaves, Inaccuracies in FE, Omission of current key accidentals, FE revisions
notation: Pitch