Hey guys,
Just adding to Tim’s reply, for those who still find it unclear - you can get rid of the notification by ensuring the meshes used as foilage are set to a single LOD. Of course, not using LODs will have performance implications, so make sure you’re aware of this and test the wider implications.
You can do this by double-clicking the mesh asset and changing the number of LODs, or changing the LOD Group to Foilage for default settings.
I hope this helps. (And I hope the image shows up here, as this is my first post in answers!)