In A there are no accidentals before the 11th semiquaver (in both hands), as a result of which both here and two notes later one should read an a(1). Chopin's patent oversight was corrected in all editions.
A cautionary 
before the 12th semiquaver – g(1) – is written in A only in the R.H. This inaccuracy was also corrected in the editions.
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category imprint: Interpretations within context; Differences between sources
issues: Omissions to cancel alteration, GE revisions, Cautionary accidentals, Last key signature sign
notation: Pitch