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org.hibernate.NonUniqueResultException: query did not return a unique result: 2	at org.hibernate.impl.AbstractQueryImpl.uniqueElement(AbstractQueryImpl.java:844)	at org.hibernate.impl.CriteriaImpl.uniqueResult(CriteriaImpl.java:328)	at org.springside.modules.orm.hibernate.SimpleHibernateDao.findUnique(SimpleHibernateDao.java:273)	at org.syaccp.approve.service.security.SecurityEntityManager.findUserByDeptAndManager(SecurityEntityManager.java:145)	at org.syaccp.approve.service.security.SecurityEntityManager$$FastClassByCGLIB$$7b0a7ec5.invoke()	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)	at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:700)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)	at org.syaccp.approve.service.security.SecurityEntityManager$$EnhancerByCGLIB$$edbf3bb2.findUserByDeptAndManager()	at org.syaccp.approve.service.jbpm.ApproveConfirmAction.execute(ApproveConfirmAction.java:45)	at org.springmodules.workflow.jbpm31.JbpmHandlerProxy.execute(JbpmHandlerProxy.java:133)	at org.jbpm.graph.def.Action.execute(Action.java:122)	at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:259)