[ERROR] org.eclipse.emf.cdo.internal.common.revision.delta.CDOFeatureDeltaImpl$UnknownValue incompatible with java.lang.String
java.lang.ClassCastException: org.eclipse.emf.cdo.internal.common.revision.delta.CDOFeatureDeltaImpl$UnknownValue incompatible with java.lang.String
	at org.eclipse.emf.cdo.internal.common.model.CDOTypeImpl$26.convertToEMF(CDOTypeImpl.java:666)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.createNotification(CDONotificationBuilder.java:305)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.visit(CDONotificationBuilder.java:174)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDOSetFeatureDeltaImpl.accept(CDOSetFeatureDeltaImpl.java:96)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:389)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:371)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.buildNotification(CDONotificationBuilder.java:94)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.sendDeltaNotifications(CDOViewImpl.java:1392)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.doInvalidateSynced(CDOViewImpl.java:1279)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.doInvalidate(CDOViewImpl.java:1216)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl$ViewInvalidation.doRun(CDOViewImpl.java:2861)
	at org.eclipse.net4j.util.concurrent.RunnableWithName.run(RunnableWithName.java:29)
	at org.eclipse.net4j.util.concurrent.SerializingExecutor.run(SerializingExecutor.java:82)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:819)



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Also for other data types
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[ERROR] org.eclipse.emf.cdo.internal.common.revision.delta.CDOFeatureDeltaImpl$UnknownValue incompatible with java.lang.Integer
java.lang.ClassCastException: org.eclipse.emf.cdo.internal.common.revision.delta.CDOFeatureDeltaImpl$UnknownValue incompatible with java.lang.Integer
	at org.eclipse.emf.cdo.internal.common.model.CDOTypeImpl$27.convertToEMF(CDOTypeImpl.java:721)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.createNotification(CDONotificationBuilder.java:305)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.visit(CDONotificationBuilder.java:174)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDOSetFeatureDeltaImpl.accept(CDOSetFeatureDeltaImpl.java:96)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:389)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:371)
	at org.eclipse.emf.internal.cdo.object.CDONotificationBuilder.buildNotification(CDONotificationBuilder.java:94)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.sendDeltaNotifications(CDOViewImpl.java:1392)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.doInvalidateSynced(CDOViewImpl.java:1279)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.doInvalidate(CDOViewImpl.java:1216)
	at org.eclipse.emf.internal.cdo.view.CDOViewImpl$ViewInvalidation.doRun(CDOViewImpl.java:2861)
	at org.eclipse.net4j.util.concurrent.RunnableWithName.run(RunnableWithName.java:29)
	at org.eclipse.net4j.util.concurrent.SerializingExecutor.run(SerializingExecutor.java:82)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:819)