fedora-cvs flag could not be set

[Miroslav Suchý]

I just wanted to set fedora-cvs flag to "?" in my bug
https://bugzilla.redhat.com/show_bug.cgi?id=491331
But it is grey (i.e disabled) and I could not change it. I can edit:
  fedora‑review   	   	
  fedora_requires_release_note 		
  needinfo
but not
  fedora-cvs

Q: Did I miss some process change? It is bug in BZ? Did somebody set 
some wrong settings? Did I forgot to set someting in BZ?
-- 
Miroslav Suchy
Red Hat Satellite Engineering