Chopin certainly regarded the pitch of the recitative's first octave as determined by 
before the minim b
at the beginning of the bar. However, the rules of notation require accidentals before the octave as well, at least before its lower note. The inaccuracy was corrected by Chopin in FED.
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category imprint: Corrections & alterations
issues: Annotations in teaching copies, Annotations in FED, Accidentals in different octaves
notation: Pitch