The minor traces of corrections performed in print, visible in FE, suggest that a 
was inserted there in place of 
. Therefore, the mark in GE would be a remaining element of an earlier version, perhaps misinterpreted by the FE engraver (from the manuscript). These marks can be difficult to tell apart in Chopin's autographs, and when they concern small rhythmic values, they are often equivalent.
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category imprint: Differences between sources
issues: GE revisions
notation: Ornaments