Printer can't be removed under Solaris 10

Dear all,
we are running a Solaris 10 8/08 Sparc system called 'test-s' where
#lpstat -t shows such a line:
system for mps2_p: printer-s (as lpd://printer-s/printers/mps2_p#Solaris)
How can we get rid of this entry because #lpstat -x mps2_p says
'unknown printer'.
THX for any help!
Rainer

#lpadmin -x printer-name