In CLI and FEcor there are no accidentals before the fourth in the lower voice, which is certainly a mistake.
CLI and FE (→GE1→GE2→GE4,→EE) have an unnecessary before b2 in this place.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in FE, GE revisions, Cautionary accidentals, Authentic corrections of FE, Errors of CLI
notation: Pitch