The cautionary 
before e1 in the 1st chord in the L.H. was added in GE and EE. In GE there is also a before B in this chord. It is certainly a remainder of the natural introducing B in the previous bar – the reviser of GE1 first added a cautionary in bar 32 and only then did he notice that the erroneous 
in bar 31 should be removed.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, GE revisions, Cautionary accidentals
notation: Pitch