NPE discovery bridge topology

Exception in thread "EnhancedLinkd-Thread-7-of-10" java.lang.NullPointerException
at org.opennms.netmgt.model.topology.SharedSegment.setDesignatedBridge(SharedSegment.java:110)
at org.opennms.netmgt.enlinkd.NodeDiscoveryBridgeTopology.findBridgesTopo(NodeDiscoveryBridgeTopology.java:1007)
at org.opennms.netmgt.enlinkd.NodeDiscoveryBridgeTopology.calculate(NodeDiscoveryBridgeTopology.java:924)
at org.opennms.netmgt.enlinkd.NodeDiscoveryBridgeTopology.calculate(NodeDiscoveryBridgeTopology.java:836)
at org.opennms.netmgt.enlinkd.NodeDiscoveryBridgeTopology.run(NodeDiscoveryBridgeTopology.java:710)
at org.opennms.netmgt.enlinkd.scheduler.Scheduler$1.run(Scheduler.java:187)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.opennms.core.concurrent.LogPreservingThreadFactory$3.run(LogPreservingThreadFactory.java:124)
at java.lang.Thread.run(Thread.java:748)