We haven't yet fully figured out yet, nor agreed, on data modeling for those cases where a Commons file depicts a creative work (or a cultural institution object in general), but the work/object doesn't have - and probably isn't notable enough to justify creating - a Wikidata item.
Let's talk about proposals and agree upon a solution for this, which can then also be used as a template / best practice in upload tools, and can be used for the creation of simplified/minimal Lua-driven SDC-powered infobox templates.