In-memory token storage will not permit expiration of user session, throws exception

Every expire action URL uses a sessionID of 0:

http://localhost:8095/crowd/console/secure/session/removeusersession!removePrincipalSession.action?ID=0

And the following exception is thrown when attempting to expire the user session:

2008-08-08 11:24:47,303 http-8095-4 ERROR [console.action.session.RemoveSession] Currently we cannot load Token's by IDjava.lang.UnsupportedOperationException: Currently we cannot load Token's by ID
at com.atlassian.crowd.model.token.TokenDAOMemory.findByID(TokenDAOMemory.java:182)
at com.atlassian.crowd.model.token.TokenDAOProxy.findByID(TokenDAOProxy.java:135)
at com.atlassian.crowd.manager.directory.DirectoryManagerGeneric.expireToken(DirectoryManagerGeneric.java:868)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:20)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy1.expireToken(Unknown Source)