diff --git a/open-metadata-implementation/admin-services/admin-services-api/src/main/java/org/odpi/openmetadata/adminservices/configuration/properties/EventBusConfig.java b/open-metadata-implementation/admin-services/admin-services-api/src/main/java/org/odpi/openmetadata/adminservices/configuration/properties/EventBusConfig.java
index 3f17bc7a047..51c760cde39 100644
--- a/open-metadata-implementation/admin-services/admin-services-api/src/main/java/org/odpi/openmetadata/adminservices/configuration/properties/EventBusConfig.java
+++ b/open-metadata-implementation/admin-services/admin-services-api/src/main/java/org/odpi/openmetadata/adminservices/configuration/properties/EventBusConfig.java
@@ -6,6 +6,7 @@
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
 
+import java.io.Serial;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
@@ -24,16 +25,15 @@
 @JsonIgnoreProperties(ignoreUnknown=true)
 public class EventBusConfig extends AdminServicesConfigHeader
 {
-    private static final long    serialVersionUID = 1L;
+    @Serial
+    private static final long serialVersionUID = 1L;
 
-    private static  String DEFAULT_TOPIC_ROOT = "egeria.omag";
+    private final static  String DEFAULT_TOPIC_ROOT = "egeria.omag";
 
     private String              connectorProvider       = null;
     private String              topicURLRoot            = null;
     private Map<String, Object> configurationProperties = null;
 
-    @Deprecated private Map<String, Object> additionalProperties    = null;
-
 
     /**
      * Default constructor