diff --git a/OpenAPI/TS28536_CoslaNrm.yaml b/OpenAPI/TS28536_CoslaNrm.yaml
index 3848c2cd6de98c1a49b4d4389a39bedd034cc9ef..fdb1c44cf1aaea72891e74a670adc7a955a65b84 100755
--- a/OpenAPI/TS28536_CoslaNrm.yaml
+++ b/OpenAPI/TS28536_CoslaNrm.yaml
@@ -74,6 +74,7 @@ components:
          
     AssuranceTargetList:
       type: array
+      uniqueItems: true
       items:
         $ref: '#/components/schemas/AssuranceTarget'
 
@@ -92,6 +93,7 @@ components:
 
     AssuranceGoalStatusList:
       type: array
+      uniqueItems: true
       items:
         $ref: '#/components/schemas/AssuranceGoalStatus'
 
@@ -110,11 +112,13 @@ components:
          
     AssuranceTargetStatusList:
       type: array
+      uniqueItems: true
       items:
          $ref: '#/components/schemas/AssuranceTargetStatus'
      
     AttributeNameList:
       type: array
+      uniqueItems: true
       items:
          type: string