Found in https://logs.opendaylight.org/releng/jenkins092/netvirt-csit-1node-openstack-newton-nodl-v2-upstream-stateful-boron/151/archives/odl1_karaf.log.gz

ERROR | pool-47-thread-1 | IdManager | 303 - org.opendaylight.genius.idmanager-impl - 0.1.3.SNAPSHOT | Release id 73031fb8-fd30-4023-880c-3e99ee8b2555.10.10.10.6/32 from pool vpnservices failed due to java.lang.RuntimeException: Specified Id key 73031fb8-fd30-4023-880c-3e99ee8b2555.10.10.10.6/32 does not exist in id pool vpnservices
2017-02-28 02:01:21,937 | WARN | pool-47-thread-1 | VpnUtil | 317 - org.opendaylight.netvirt.vpnmanager-impl - 0.3.3.SNAPSHOT | RPC Call to Get Unique Id returned with Errors [RpcError [message=Specified Id key 73031fb8-fd30-4023-880c-3e99ee8b2555.10.10.10.6/32 does not exist in id pool vpnservices, severity=ERROR, errorType=APPLICATION, tag=operation-failed, applicationTag=null, info=null, cause=null]]
2017-02-28 02:01:21,938 | ERROR | pool-47-thread-1 | InterfaceManagerRpcService | 308 - org.opendaylight.genius.interfacemanager-impl - 0.1.3.SNAPSHOT | Retrieval of datapath id for the key

failed due to missing Interface in Config DataStore
2017-02-28 02:01:21,938 | ERROR | pool-47-thread-1 | NatUtil | 326 - org.opendaylight.netvirt.natservice-impl - 0.3.3.SNAPSHOT | NAT Service : Could not retrieve DPN Id for interface 0ebcfc46-bb29-4412-be6c-6435dfa6ea23
2017-02-28 02:01:21,938 | WARN | pool-47-thread-1 | NatUtil | 326 - org.opendaylight.netvirt.natservice-impl - 0.3.3.SNAPSHOT | NAT Service : Could not retrieve dp id for interface 0ebcfc46-bb29-4412-be6c-6435dfa6ea23 to handle router 6e80c6ec-3aea-407d-969e-c987e55c4011 dissociation model