Hello,
I am also trying to change the filament diameter.
Why would you like to change the compatible diameter? Maybe just change the material diameter or try to change the material diameter before the compatible diameter settings.
So far I do not understand what the compatible diameter settings in the printer is used for. Is it used for any parameter calculations? or just there for warning reasons if material diameter > compatible diameter?
I made several observations so far
1.) Printer Settings, change of the compatible material diameter
2.) Material setting, change of diameter is almost impossible. Even with duplicating the material profile, unlink material. Still changes the material diameter back, after new setting. I think duplicating the material, unlink it, change the material diameter works.
3.) Sometimes warning if material diameter does not fit the compatible material diameter of the printer setting and slicing shows failures. For example printing time goes up from 3 to 5 hours. Maybe the sequence is relevant.