Incremental Synchronisation Failed for JIRA Connecting to Crowd

2012-12-21 22:54:17,216 QuartzWorker-1 INFO ServiceRunner     [atlassian.crowd.directory.DbCachingRemoteDirectory] synchronisation for directory [ 10000 ] starting
2012-12-21 22:54:17,370 QuartzWorker-1 INFO ServiceRunner     [atlassian.crowd.directory.DbCachingRemoteDirectory] failed synchronisation complete in [ 154ms ]
2012-12-21 22:54:17,423 QuartzWorker-1 ERROR ServiceRunner     [atlassian.crowd.directory.DbCachingDirectoryPoller] Error occurred while refreshing the cache for directory [ 10000 ].
com.atlassian.crowd.embedded.ofbiz.db.DataAccessException: org.ofbiz.core.entity.GenericEntityException: while inserting: [GenericEntity:Membership][id,22478][membershipType,GROUP_USER][lowerParentName,jira-users][parentId,10113][childId,13679][childName,tynyyespz][lowerChildName,tynyyespz][directoryId,10000][parentName,jira-users] (SQL Exception while executing the following:INSERT INTO cwd_membership (ID, parent_id, child_id, membership_type, group_type, parent_name, lower_parent_name, child_name, lower_child_name, directory_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) (Duplicate entry '10113-13679-GROUP_USER' for key 'uk_mem_parent_child_type'))
	at com.atlassian.crowd.embedded.ofbiz.db.OfBizHelper.createValue(OfBizHelper.java:167)
	at com.atlassian.crowd.embedded.ofbiz.OfBizInternalMembershipDao.createMembership(OfBizInternalMembershipDao.java:97)
	at com.atlassian.crowd.embedded.ofbiz.OfBizInternalMembershipDao.addUserToGroup(OfBizInternalMembershipDao.java:90)
	at com.atlassian.crowd.embedded.ofbiz.OfBizDelegatingMembershipDao.addUserToGroup(OfBizDelegatingMembershipDao.java:78)
	at com.atlassian.crowd.directory.AbstractInternalDirectory.addUserToGroup(AbstractInternalDirectory.java:695)
	at com.atlassian.crowd.directory.DbCachingRemoteChangeOperations.addUserToGroup(DbCachingRemoteChangeOperations.java:1151)
	at com.atlassian.crowd.directory.DirectoryCacheImplUsingChangeOperations.addUserToGroup(DirectoryCacheImplUsingChangeOperations.java:187)
	at com.atlassian.crowd.directory.ldap.cache.EventTokenChangedCacheRefresher.synchroniseChanges(EventTokenChangedCacheRefresher.java:115)
	at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:609)
	at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:63)
	at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:50)
	at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJob.execute(DirectoryPollerJob.java:34)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
	at com.atlassian.multitenant.quartz.MultiTenantThreadPool$MultiTenantRunnable.run(MultiTenantThreadPool.java:72)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
Caused by: org.ofbiz.core.entity.GenericEntityException: while inserting: [GenericEntity:Membership][id,22478][membershipType,GROUP_USER][lowerParentName,jira-users][parentId,10113][childId,13679][childName,tynyyespz][lowerChildName,tynyyespz][directoryId,10000][parentName,jira-users] (SQL Exception while executing the following:INSERT INTO cwd_membership (ID, parent_id, child_id, membership_type, group_type, parent_name, lower_parent_name, child_name, lower_child_name, directory_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) (Duplicate entry '10113-13679-GROUP_USER' for key 'uk_mem_parent_child_type'))
	at org.ofbiz.core.entity.GenericDAO.singleInsert(GenericDAO.java:135)
	at org.ofbiz.core.entity.GenericDAO.insert(GenericDAO.java:100)
	at org.ofbiz.core.entity.GenericHelperDAO.create(GenericHelperDAO.java:64)
	at org.ofbiz.core.entity.GenericDelegator.create(GenericDelegator.java:487)
	at org.ofbiz.core.entity.GenericDelegator.create(GenericDelegator.java:467)
	at org.ofbiz.core.entity.GenericValue.create(GenericValue.java:98)
	at com.atlassian.crowd.embedded.ofbiz.db.OfBizHelper.createValue(OfBizHelper.java:162)