GC
compare
In EE, GC and FE there is no 
raising a2 to a
2. The accidental was added in GE, which must have been done by the reviser.
Compare the passage in the sources »
See b. 337
category imprint: Differences between sources
issues: Accidentals in different octaves, Inaccuracies in FE, GE revisions, EE inaccuracies, Inaccuracies in GC
notation: Pitch