In A (→GE1→FE→EE1→EE2) there is neither a 
returning a
2 in bar 107 nor a cautionary before e3 in bar 108. In GE2 only the first was added and in EE3 – only the second.
In analogous bars 105-106, Chopin wrote in A both signs, which suggests that at the time of writing a repeating phrase, the composer's concentration broke (cf. bar 107). It increases the likelihood of oversights of ties at the end of bar 108.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Omissions to cancel alteration, GE revisions, Cautionary accidentals, Errors of A, Errors repeated in GE, Errors repeated in FE, Errors repeated in EE
notation: Pitch