NPE in CdpLink.toString()

SLF4J: Failed toString() invocation on an object of type [org.opennms.netmgt.model.CdpLink]
java.lang.NullPointerException
at org.opennms.netmgt.model.CdpLink.toString(CdpLink.java:383)
at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:305)
at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:277)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:231)
at org.slf4j.helpers.MessageFormatter.format(MessageFormatter.java:152)
at org.ops4j.pax.logging.slf4j.Slf4jLogger.info(Slf4jLogger.java:514)
at org.opennms.features.topology.plugins.topo.linkd.internal.EnhancedLinkdTopologyProvider.getCdpLinks(EnhancedLinkdTopologyProvider.java:963)
at org.opennms.features.topology.plugins.topo.linkd.internal.EnhancedLinkdTopologyProvider.loadCompleteTopology(EnhancedLinkdTopologyProvider.java:622)
at org.opennms.features.topology.plugins.topo.linkd.internal.EnhancedLinkdTopologyProvider.load(EnhancedLinkdTopologyProvider.java:471)
at org.opennms.features.topology.plugins.topo.linkd.internal.EnhancedLinkdTopologyProvider.refresh(EnhancedLinkdTopologyProvider.java:1118)
at org.opennms.features.topology.api.support.VertexHopGraphProvider.refresh(VertexHopGraphProvider.java:289)
at org.opennms.features.topology.plugins.topo.linkd.internal.NodeACLVertexProvider.refresh(NodeACLVertexProvider.java:86)
at Proxybadc5fca_115e_4cf8_8915_bf8e5bb182a7.refresh(Unknown Source)
at org.opennms.features.topology.app.internal.TopologyUI.loadGraphProvider(TopologyUI.java:350)
at org.opennms.features.topology.app.internal.TopologyUI.init(TopologyUI.java:235)
at com.vaadin.ui.UI.doInit(UI.java:641)