The e1 note, featured next to c1 in the lower voice both in CLI and Ap, was deleted by Chopin in FEcor. The simultaneously added fingering – the 2nd finger on a1 – already considers this change and cannot be applied to the original version (most probably Chopin would use the 5th finger in that situation).
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Accompaniment changes, Authentic corrections of FE
notation: Pitch