Incremental synchronization is failing with duplicated groups

 ERROR [Caesium-1-1] c.a.c.d.DbCachingRemoteDirectory Incremental synchronisation for directory [ xxxxxxx ] was unexpectedly interrupted, falling back to a full synchronisation
com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresherIncSyncException: Problems while looking up users by objectGUID in ActiveDirectory detected, falling back to a full sync.
at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.lambda$synchroniseGroupChanges$4(UsnChangedCacheRefresher.java:451)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.synchroniseGroupChanges(UsnChangedCacheRefresher.java:458)
at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.synchroniseChanges(UsnChangedCacheRefresher.java:111)
at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:1006)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.lambda$synchronise$0(DirectorySynchroniserImpl.java:80)
at com.atlassian.crowd.audit.NoOpAuditLogContext.withAuditLogSource(NoOpAuditLogContext.java:17)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:78)
at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:45)
at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJobRunner.runJob(DirectoryPollerJobRunner.java:92)
at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134)
at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106)
at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:435)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:430)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:454)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:382)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35)
at java.lang.Thread.run(Thread.java:748)
... 11 frames trimmed