Trying to clear a single line key on an ACD phone. When I attempt to clear the line, I get the message "Users are associated with this Hosted Service". When I look at the telephone directory on all 3 of my controllers, this number does not exist, so there is nothing to remove ahead of time like others have stated to do. We rebooted the controller last night, and still get the same message this morning when I attempt to clear the key. Any ideas?