Lack of e1 in the editions is, according to us, a result of a misreading of A, yet Chopin could have accepted this version at the stage of proofreading FE. Therefore, in the main text we suggest a variant solution.
In A there are visible traces of corrections, perhaps from the following version:
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category imprint: Graphic ambiguousness; Differences between sources
issues: Inaccuracies in FE, Uncertain notes on ledger lines
notation: Pitch