The chord with c2 is most probably a result of an oversight of the composer, which is confirmed by the added – probably by Chopin – in FE3 (→FE4).
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Corrections & alterations
issues: EE revisions, Errors in FE, GE revisions, Omission of current key accidentals, Authentic corrections of FE, Last key signature sign
notation: Pitch