MD-SAL throwing following exception when statistics manager (MD-SAL based) augmenting group-feature to the node.

Exception:
TransactionCommitFailedException{message=Data did not pass validation., errorList=[RpcError [message=Data did not pass validation., severity=ERROR, errorType=APPLICATION, tag=operation-failed, applicationTag=null, info=null, cause=org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException: Node /(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:17592186044417}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:group:statistics?revision=2013-11-11)group-features]}

does not exist. Cannot apply modification to its children.]]}
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl.canCommit(InMemoryDOMDataStore.java:244)[163:org.opendaylight.controller.sal-inmemory-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.store.impl.ChainedTransactionCommitImpl.canCommit(ChainedTransactionCommitImpl.java:30)[163:org.opendaylight.controller.sal-inmemory-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.CommitCoordinationTask.canCommitAll(CommitCoordinationTask.java:121)[157:org.opendaylight.controller.sal-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.CommitCoordinationTask.canCommitBlocking(CommitCoordinationTask.java:93)[157:org.opendaylight.controller.sal-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.CommitCoordinationTask.call(CommitCoordinationTask.java:57)[157:org.opendaylight.controller.sal-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.CommitCoordinationTask.call(CommitCoordinationTask.java:27)[157:org.opendaylight.controller.sal-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.yangtools.util.concurrent.DeadlockDetectingListeningExecutorService$2.call(DeadlockDetectingListeningExecutorService.java:192)[73:org.opendaylight.yangtools.util:0.7.0.SNAPSHOT]
at java.util.concurrent.FutureTask.run(FutureTask.java:262)[:1.7.0_72]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_72]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_72]
at java.lang.Thread.run(Thread.java:745)[:1.7.0_72]
Caused by: org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException: Node /(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:17592186044417}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:group:statistics?revision=2013-11-11)group-features]}

does not exist. Cannot apply modification to its children.
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:161)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:135)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkChildPreconditions(NormalizedNodeContainerModificationStrategy.java:175)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:165)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:135)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkChildPreconditions(NormalizedNodeContainerModificationStrategy.java:175)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:165)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:135)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkChildPreconditions(NormalizedNodeContainerModificationStrategy.java:175)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:165)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:135)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkChildPreconditions(NormalizedNodeContainerModificationStrategy.java:175)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:165)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:135)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:72)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTree.validate(InMemoryDataTree.java:77)[93:org.opendaylight.yangtools.yang-data-impl:0.7.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl.canCommit(InMemoryDOMDataStore.java:232)[163:org.opendaylight.controller.sal-inmemory-datastore:1.2.0.SNAPSHOT]
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