The version of GE1b with the d
2-f2 third results most probably from the re-engraving of the final fragment of this bar due to wear and tear of the engraver plate (cf. similar situations in Andante spianato from Op. 22 or Concerto in F minor, op. 21, mvt. I). The remaining sources have notes at the correct height (which does not mean that the text is correct – see the previous note in this bar).
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in GE
notation: Pitch