... but it was never saved as an export

Hoping someone can help me out. I’ve butted my head against this problem several times, and it never seems to work. I’ve tried recompiling/saving, and we already exclude editor content and the like. Hundreds to thousands of lines along the lines of

[14:34:03] :	 [Step 4/7]   LogSavePackage: Warning: /Game/Maps/ZM_Village imported Serialize:/Game/Models/ZM/Village/VillageBuilding1B.VillageBuilding1B, but it was never saved as an export.

I’d be surprised if it was the path length as that doesn’t seem that long, maybe 100 characters.
Surely there’s some reason as to why this is happening? I think I even tried scouring some objects for circular dependencies, but that didn’t seem to affect it.