The cautionary 
before e2 at the beginning of bar 6 was added in a proofreading of FE (→GE,EE). In the main text we still add a few cautionary signs in bar 8 – flats before a2 on the 3rd and a1 on the 5th quavers, as well as a 
before f2 on the 6th quaver. The flats were already added in GE2 (→GE3→GE4), while the first of them also in EE4.
Compare the passage in the sources »
category imprint: Differences between sources; Editorial revisions
issues: EE revisions, GE revisions, Cautionary accidentals, Authentic corrections of FE
notation: Pitch