In FE the 
at the beginning of the bar was placed too low, next to a1, which does not require an accidental. However, the patent mistake was corrected only in GE.
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category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Errors in FE, Errors in GE, GE revisions, Authentic corrections of GE, Errors repeated in EE
notation: Pitch