In the CM Installed tab add the search criteria name = corona then add name = red
This will give you a number of red coronas, make a note of the kuid of one of them, then find your Remanb11's LU 1973 asset. Open it for edit in explorer, open the config.txt file for editing in for example notepad and replace the occurrences of <KUID:67906:21000> with the kuid of your chosen corona (there will probably be at least two of them, do not forget the kuid table). Save the modified file, close down the explorer window and "Edit" "Commit" your asset.