RPC: removing a non-existent space results in a 'No permission to remove spaces' XmlRpcSxception

org.apache.xmlrpc.XmlRpcException: java.lang.Exception: com.atlassian.confluence.rpc.NotPermittedException: No permission to remove spaces.
at org.apache.xmlrpc.XmlRpcClient$Worker.execute(Unknown Source)
at org.apache.xmlrpc.XmlRpcClient.execute(Unknown Source)
at com.atlassian.confluence.rpc.SpaceRpcAcceptanceTest.testSpaceMethods(SpaceRpcAcceptanceTest.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at com.intellij.rt.execution.junit2.JUnitStarter.main(JUnitStarter.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)