The LookupTablePropertySerializer has a hard coded string to save the lut in an .xml file:
TiXmlElement* element = new TiXmlElement("LookupTable");
This means that all lookuptables will be saved using this name and we will have problems loading old scenes, if we rename a property like this. It could be even worse, if all properties have hard coded connections like this.
It seems like the scene reader (see mitk::SceneReader::LoadScene) is using a version, but I am not sure if we can use this to be compatible to older scene files. This could be a huge project...