In As and AI, the last crotchet in bar 64 is an a1, whereas in As it is written at the end of the previous section as a g1. The photocopy of A available to the editors is not very legible in this place; however, it seems to be very likely that Chopin changed there a1 to f1.
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category imprint: Differences between sources; Editorial revisions; Corrections & alterations
issues: Enharmonic corrections, Main-line changes
notation: Pitch