Can't edit personal profile

I get this exception when trying to edit my personal description:

org.springframework.orm.hibernate.HibernateSystemException: Found shared references to a collection; nested exception is:
net.sf.hibernate.HibernateException: Found shared references to a collection
net.sf.hibernate.HibernateException: Found shared references to a collection
at net.sf.hibernate.impl.SessionImpl.updateReachableCollection(SessionImpl.java:2785)
at net.sf.hibernate.impl.FlushVisitor.processCollection(FlushVisitor.java:63)
at net.sf.hibernate.impl.AbstractVisitor.processValue(AbstractVisitor.java:137)
at net.sf.hibernate.impl.AbstractVisitor.processValues(AbstractVisitor.java:71)
at net.sf.hibernate.impl.SessionImpl.flushEntity(SessionImpl.java:2500)
at net.sf.hibernate.impl.SessionImpl.flushEntities(SessionImpl.java:2366)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2200)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2179)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:309)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:218)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:172)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:196)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:135)
at $Proxy6.savePersonalInformation(Unknown Source)
at com.atlassian.confluence.user.actions.EditMyProfileAction.updatePersonalInformation(EditMyProfileAction.java:113)
at com.atlassian.confluence.user.actions.EditMyProfileAction.doEdit(EditMyProfileAction.java:70)