Regression with BGP Link State

Since release bgpcep-0.16.8, BGP is failing to start properly and establish a BGP session with a peer for Link State family.

A fist set of error occurs when BGP Topology Deployer started:

opendaylight-cluster-data-akka.actor.default-dispatcher-5 | ClusterSingletonServiceGroupImpl | 261 - org.opendaylight.mdsal.singleton-dom-impl - 8.0.7 | Service group example-bgp-rib-service-group service org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService@3a8d67e1 failed to start, attempting to continue
com.google.common.base.VerifyException: expected a non-null reference

Then a problem occurs with data store when adding a peer:

org.opendaylight.mdsal.common.api.OptimisticLockFailedException: Optimistic lock failed for path /(urn:opendaylight:params:xml:ns:yang:bgp-rib?revision=2018-03-29)bgp-rib/rib/rib[\{(urn:opendaylight:params:xml:ns:yang:bgp-rib?revision=2018-03-29)id=example-bgp-rib}]/loc-rib/tables/tables[\{(urn:opendaylight:params:xml:ns:yang:bgp-rib?revision=2018-03-29)afi=(urn:opendaylight:params:xml:ns:yang:bgp-linkstate?revision=2020-01-20)linkstate-address-family, (urn:opendaylight:params:xml:ns:yang:bgp-rib?revision=2018-03-29)safi=(urn:opendaylight:params:xml:ns:yang:bgp-linkstate?revision=2020-01-20)linkstate-subsequent-address-family}]/attributes

This conduct to many errors when attempting to write Link State information into the Datastore.

Full log is attached.