Dirty Lighting?

I've been hiving issues with this one large prop In my game for a bit. I have re added the model after cutting it down and fixing textures but I'm now getting this warning message "LogEngine: Warning: MapBuildDataID for LevelSix_Under was updated during the static lighting build, marking package dirty (StaticMeshComponent /Game/ThirdPerson/Lvl_Six.Lvl_Six:PersistentLevel.StaticMeshActor_57.StaticMeshComponent0)". Does anyone know how to fix this? If it helps, I've also started using LODs and got rid of luman and nanite.