The fingering in the L.H. was added by Chopin during a proofreading of FE (→GE,EE). Chopin suggests here a different, slightly more demanding finger arrangement than at the beginning of the piece.
Probably it turned out to be too difficult for Jane Stirling, as in her pupil's copy (FES) digits suggesting use of a more convenient fingering were added. According to us, the entry, despite including only two digits, changes the fingering in the entire bar (perhaps this is what the sharp over the fingering reminds of?), which we also suggests in the main text in the variant form.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: Annotations in teaching copies, Annotations in FES, Authentic corrections of FE
notation: Fingering