This refers to a potentially unknown or uncatalogued work by Bach, possibly an early composition or a pedagogical piece. Its musical distinctiveness would depend on its actual content and style.
The primary technical challenge would be to decipher and interpret a potentially uncatalogued work with accuracy.
Bach-anh-114 is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
Bach-anh-114 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.