How to remove checkouts to a view that no longer exists

% cleartool describe -long vob:vobtag
versioned object base "vobtag"
  created 31-Dec-00.16:23:00 by ClearCase VOB admin account (vobadm.staff)
  VOB family feature level: 2
  VOB storage host:pathname "someplace"
  VOB storage global pathname "someplace"
  database schema version: 53
  VOB ownership:
    owner someone
    group some group
  Additional groups:
    ...
  VOB holds objects from the following views:
    ? [uuid c00c3821.f94411d4.ba94.00:01:80:a9:33:fe]
    ...

You then can remove all the references to the non-existing view by running:

% cleartool rmview -force -avobs -uuid c00c3821.f94411d4.ba94.00:01:80:a9:33:fe
Removing references ...