OptimisticLockFailedException.../flow/flow...id=L3.53688268439021.20.0L3

org.opendaylight.mdsal.common.api.OptimisticLockFailedException: Optimistic lock failed for path /(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:53688268439021}]/AugmentationIdentifier{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features, (urn:opendaylight:flow:inventory?revision=2013-08-19)stale-meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)stale-group, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)port-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)table-features, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)ip-address]}/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/table[{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=20}]/flow/flow[{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=L3.53688268439021.20.0L3.}]