Compression or Light Optimization of one Model does not affect any other Models.
This error message says that you have a "yellow" request in the cube. Can you please check if that is true? If you have such request then most probably somebody posted some records in that cube after LO started. You can try to find who that was by looking at records in that yellow request.
If you don't have a yellow request in the cube when LO fails than it's a bug and you have to open an OSS Incident.