In the main text in both bars we add cautionary flats to b
and d1. In A (→FE1) Chopin wrote only the latter (a 
to d1 in bar 74). In FE1 a to d1 was added in bar 73, in GE a to b in bar 74, while in EE both flats.
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category imprint: Differences between sources; Editorial revisions
issues: EE revisions, GE revisions, Cautionary accidentals, FE revisions
notation: Pitch