The accent in GC was probably added by Chopin. In GE, clearly against the manuscript, it was assigned to the L.H. and it was given a shape of a common, short accent. Such placed sign was repeated in EE2.
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category imprint: Differences between sources; Corrections & alterations
issues: Long accents, EE revisions, Inaccuracies in GE, Authentic corrections in GC
notation: Articulation, Accents, Hairpins