There are some services on a recently provisioned node which were detected but which are transient. To avoid unnecessary alerts and notifications, we just wanted to delete the service. I therefore went into the provision requisition administration, removed the service (because the service was SNMP, I also changed the SNMP Primary field of the IP interface from P to N), and I pressed synchronize for that foreign source.
Eventually an event showed up on the node page saying
23498890 2/17/12 12:23:35 Warning The SNMP service on interface <ip address> has been scheduled for deletion.
However, one half hour later the service still hadn't been deleted. I then forcibly unmanaged the service. After waiting the whole weekend, the service still has not been deleted.
The Provisioning User's Guide seems to indicate that this process should result in the deletion of the service and the event seems to confirm it. However no error message seems to indicate why the service is not being deleted from that node/interface in the database.