The omission of the mordent in FE (→EE1) is certainly a mistake – it is hard to imagine that Chopin could have not noticed the remaining mistakes while possibly removing the ornament. However, it should be emphasised that in FED Chopin did not add 
, in spite of having corrected two other mistakes in the 1st half of the bar. The sign was added in EE2 (→EE3), probably after GE1. The staccato dot present in the sources is a result of a mistake of GE1 – see the note above.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Errors in FE
notation: Ornaments