3.2.4.3 Unmarshal Server Object
When the higher layer unregisters a Server Object using its Server Object URI, an implementation MUST do the following:
If the Server Object URI is not found in the Server Object Table, then the higher layer MUST be notified about the error and not do the following:
Remove the entry with the Server Object URI from the Server Object Table.
The requests that are being processed, if any, MUST be allowed to complete.