Error after light building

Hello,

I get this warning for my rocks once the lighting baking is finished. What’s should I do for the warnings to disappear?
Also worth mentioning, with Stationary Directional Light once the light is finished building, the rocks have no shadow casting. It works fine with Static Directional Light only.

I did my googling and couldn’t come to any solution.
Thanks.

From the warning, It looks like your LODs have different unwraps on UV1.

Strangely enough the warnings were coming from a Grass Type linked to landscape material which had no meshes loaded in it. My issue is resolved, but not sure why it was doing that. :confused:

Thanks.