com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresherIncSyncException: Cache returned different number of guids and groups (possible reason is overlapping guids in cache, most likely null/empty values).
        at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.validateAndReturnGroupGuidsToAddAndDelete(UsnChangedCacheRefresher.java:380)
        at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.synchroniseGroupChanges(UsnChangedCacheRefresher.java:406)
        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.AuditLogContextInternalImpl.withAuditLogSource(AuditLogContextInternalImpl.java:52)
        at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:78)
        at sun.reflect.GeneratedMethodAccessor1383.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
        at com.sun.proxy.$Proxy68.synchronise(Unknown Source)
        at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:45)
        at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJobRunner.runJob(DirectoryPollerJobRunner.java:85)
        at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153)
        at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118)
        at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:443)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:438)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:462)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:390)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:285)
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:282)
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:65)
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:59)
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)
        at java.lang.Thread.run(Thread.java:748)