diff --git a/JSON_for_IO-Link.yaml b/JSON_for_IO-Link.yaml
index 9f4f538..5d6efdc 100644
--- a/JSON_for_IO-Link.yaml
+++ b/JSON_for_IO-Link.yaml
@@ -750,6 +750,7 @@ paths:
                   $ref: "./schemas.yaml#/schemas/mqttConfigurationTopicGet"
               example:
                 - topicId: 1
+                  activate: true
                   topicName: Sensor34/processData
                   qos: 1_AT_LEAST_ONCE
                   deviceAlias: DT35
@@ -760,11 +761,13 @@ paths:
                       value: 10
                       unit: ms
                 - topicId: 2
+                  activate: true
                   topicName: Sensor34/event
                   qos: 1_AT_LEAST_ONCE
                   deviceAlias: TAD081
                   event: {}
                 - topicId: 3
+                  activate: false
                   topicName: PD
                   qos: 0_ONLY_ONCE
                   deviceAlias: BNI_IOL
@@ -773,6 +776,7 @@ paths:
                     format: iodd
                     onChange: true
                 - topicId: 4
+                  activate: false
                   topicName: DT35_CycleTime
                   qos: 0_ONLY_ONCE
                   deviceAlias: DT35
@@ -782,6 +786,7 @@ paths:
                     format: iodd
                     onChange: true
                 - topicId: 5
+                  activate: true
                   topicName: deviceTemperature
                   qos: 0_ONLY_ONCE
                   deviceAlias: master1port2
@@ -814,7 +819,7 @@ paths:
               schema:
                 $ref: "./schemas.yaml#/schemas/errorObject_106"
     post:
-      operationId: PostMqttTopicsTopicId
+      operationId: PostMqttTopics
       tags:
         - mqtt
       summary: Create a new MQTT topic.
@@ -828,6 +833,7 @@ paths:
             examples:
               Process Data:
                 value:
+                  activate: true
                   qos: 1_AT_LEAST_ONCE
                   deviceAlias: DT35
                   processData:
@@ -838,11 +844,13 @@ paths:
                       unit: ms
               Event:
                 value:
+                  activate: true
                   qos: 1_AT_LEAST_ONCE
                   deviceAlias: TAD081
                   event: {}
               Parameter (Index):
                 value:
+                  activate: false
                   qos: 0_ONLY_ONCE
                   deviceAlias: master1port1
                   parameter:
@@ -853,6 +861,7 @@ paths:
                       unit: ms
               Parameter (ParameterName):
                 value:
+                  activate: true
                   topicName: deviceTemperature
                   qos: 0_ONLY_ONCE
                   deviceAlias: AHM36A
@@ -927,6 +936,7 @@ paths:
                 Process Data:
                   value:
                     topicId: 1
+                    activate: true
                     topicName: PD input
                     qos: 1_AT_LEAST_ONCE
                     deviceAlias: DT35
@@ -939,6 +949,7 @@ paths:
                 Event:
                   value:
                     topicId: 2
+                    activate: true
                     topicName: Event
                     qos: 1_AT_LEAST_ONCE
                     deviceAlias: TAD081
@@ -946,6 +957,7 @@ paths:
                 Parameter (Index):
                   value:
                     topicId: 3
+                    activate: true
                     topicName: devvice/indexXY
                     qos: 0_ONLY_ONCE
                     deviceAlias: master1port1
@@ -958,6 +970,7 @@ paths:
                 Parameter (ParameterName):
                   value:
                     topicId: 5
+                    activate: true
                     topicName: deviceTemperature
                     qos: 0_ONLY_ONCE
                     deviceAlias: AHM36A
@@ -991,6 +1004,104 @@ paths:
             application/json:
               schema:
                 $ref: "./schemas.yaml#/schemas/errorObject_106"
+    post:
+      operationId: PostMqttTopicsTopicId
+      parameters:
+        - $ref: "#/components/parameters/mqttTopicId"
+      tags:
+        - mqtt
+      summary: Change or deactivate one MQTT topic.
+      description: Change or deactivate one MQTT topic.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "./schemas.yaml#/schemas/mqttConfigurationTopicsTopicPost"
+            examples:
+              Deactivate Topic:
+                value:
+                  activate: false
+              Activate Topic:
+                value:
+                  activate: true
+              Process Data:
+                value:
+                  topicId: 1
+                  activate: true
+                  topicName: PD input
+                  qos: 1_AT_LEAST_ONCE
+                  deviceAlias: DT35
+                  processData:
+                    direction: getData
+                    format: iodd
+                    interval:
+                      value: 10
+                      unit: ms
+              Event:
+                value:
+                  topicId: 2
+                  activate: true
+                  topicName: Event
+                  qos: 1_AT_LEAST_ONCE
+                  deviceAlias: TAD081
+                  event: {}
+              Parameter (Index):
+                value:
+                  topicId: 3
+                  topicName: devvice/indexXY
+                  qos: 0_ONLY_ONCE
+                  deviceAlias: master1port1
+                  parameter:
+                    index: 86
+                    format: byteArray
+                    interval:
+                      value: 10
+                      unit: ms
+              Parameter (ParameterName):
+                value:
+                  topicId: 5
+                  activate: true
+                  topicName: deviceTemperature
+                  qos: 0_ONLY_ONCE
+                  deviceAlias: AHM36A
+                  parameter:
+                    parameterName: Temperature1
+                    format: iodd
+                    interval:
+                      value: 1000
+                      unit: ms
+      responses:
+        "200":
+          description: Successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+        "401":
+          $ref: "#/components/responses/HTTP_401"
+        "403":
+          $ref: "#/components/responses/HTTP_403"
+        "404":
+          description: Not Found
+          content:
+            application/json:
+              schema:
+                oneOf:
+                  - $ref: "./schemas.yaml#/schemas/errorObject_103"
+                  - $ref: "./schemas.yaml#/schemas/errorObject_301"
+        "500":
+          description: Internal Server Error
+          content:
+            application/json:
+              schema:
+                $ref: "./schemas.yaml#/schemas/errorObject_101"
+        "501":
+          description: Not Implemented
+          content:
+            application/json:
+              schema:
+                $ref: "./schemas.yaml#/schemas/errorObject_106"
     delete:
       operationId: DeleteMqttTopicsTopicId
       tags:
@@ -3728,7 +3839,6 @@ components:
         minimum: 0
         maximum: 255
       required: true
-    
   responses:
     HTTP_401:
       description: Authentication information is missing or invalid
diff --git a/schemas.yaml b/schemas.yaml
index 4a81c4d..e1a187a 100644
--- a/schemas.yaml
+++ b/schemas.yaml
@@ -636,6 +636,8 @@ schemas:
           - qos
           - deviceAlias
         properties:
+          activate:
+            type: boolean
           qos:
             type: string
             enum:
@@ -660,6 +662,29 @@ schemas:
           topicName:
             type: string
       - $ref: "#/schemas/mqttConfigurationTopic"
+  mqttConfigurationTopicsTopicPost:
+    anyOf:
+      - type: object
+        properties:
+          topicId:
+            type: integer
+      - type: object
+        properties:
+          topicName:
+            type: string
+      - $ref: "#/schemas/mqttConfigurationTopic"
+    example:
+      topicId: 1
+      activate: true
+      topicName: PD input
+      qos: 1_AT_LEAST_ONCE
+      deviceAlias: DT35
+      processData:
+        direction: getData
+        format: iodd
+        interval:
+          value: 10
+          unit: ms
   mqttConfigurationTopicGet:
     allOf:
       - type: object