The turn sign with a vertical line used by Chopin in A means an ordinary turn—i.e. having the note sequence: upper auxiliary-principal-lower auxiliary-principal—with the raised lower auxiliary note (cf. the notation of that ornament in bar 12 in two autographs of the Nocturne in B op. 62 no. 1; the earlier has a crossed turn, while the later has a turn with the raised lower auxiliary note, written out in small notes). However, such an understanding of that sign has not been generally accepted: more often it is understood as signifying a reversed turn (lower auxiliary-principal-upper auxiliary-principal note). This ambiguity could have been the reason for using an ordinary, unmodified turn in GE.
Chopin's correction of FE in that point is doubtless; copies of FE have visible traces of the removed turn. Also, there is no reason to consider the addition of a tie sustaining e flat2 to be a mistake.
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category imprint: Interpretations within context; Differences between sources; Corrections & alterations
issues: Turn
notation: Pitch