diff --git a/bundles/org.openhab.binding.mqtt.homeassistant/src/main/java/org/openhab/binding/mqtt/homeassistant/internal/component/DeviceTrigger.java b/bundles/org.openhab.binding.mqtt.homeassistant/src/main/java/org/openhab/binding/mqtt/homeassistant/internal/component/DeviceTrigger.java
index d3e1ebcc047f5..68723b765a9d5 100644
--- a/bundles/org.openhab.binding.mqtt.homeassistant/src/main/java/org/openhab/binding/mqtt/homeassistant/internal/component/DeviceTrigger.java
+++ b/bundles/org.openhab.binding.mqtt.homeassistant/src/main/java/org/openhab/binding/mqtt/homeassistant/internal/component/DeviceTrigger.java
@@ -111,17 +111,22 @@ public boolean merge(DeviceTrigger other) {
         newConfiguration.put("nodeid", currentConfiguration.get("nodeid"));
         Object objectIdObject = currentConfiguration.get("objectid");
         if (objectIdObject instanceof String objectIdString) {
-            newConfiguration.put("objectid", List.of(objectIdString, other.getHaID().objectID));
+            if (!objectIdString.equals(other.getHaID().objectID)) {
+                newConfiguration.put("objectid", List.of(objectIdString, other.getHaID().objectID));
+            }
         } else if (objectIdObject instanceof List<?> objectIdList) {
-            newConfiguration.put("objectid",
-                    Stream.concat(objectIdList.stream(), Stream.of(other.getHaID().objectID)).toList());
+            newConfiguration.put("objectid", Stream.concat(objectIdList.stream(), Stream.of(other.getHaID().objectID))
+                    .sorted().distinct().toList());
         }
         Object configObject = currentConfiguration.get("config");
         if (configObject instanceof String configString) {
-            newConfiguration.put("config", List.of(configString, other.getChannelConfigurationJson()));
+            if (!configString.equals(other.getChannelConfigurationJson())) {
+                newConfiguration.put("config", List.of(configString, other.getChannelConfigurationJson()));
+            }
         } else if (configObject instanceof List<?> configList) {
             newConfiguration.put("config",
-                    Stream.concat(configList.stream(), Stream.of(other.getChannelConfigurationJson())).toList());
+                    Stream.concat(configList.stream(), Stream.of(other.getChannelConfigurationJson())).sorted()
+                            .distinct().toList());
         }
 
         // Append payload to allowed values
@@ -130,7 +135,8 @@ public boolean merge(DeviceTrigger other) {
             // Need to accept anything
             value = new TextValue();
         } else {
-            String[] newValues = Stream.concat(payloads.stream(), Stream.of(otherPayload)).toArray(String[]::new);
+            String[] newValues = Stream.concat(payloads.stream(), Stream.of(otherPayload)).distinct()
+                    .toArray(String[]::new);
             value = new TextValue(newValues);
         }