1 files changed, 6 insertions, 0 deletions
diff --git a/src/main/java/org/onap/clamp/loop/LoopService.java b/src/main/java/org/onap/clamp/loop/LoopService.java
index ca3681b6..3f568a33 100644
--- a/src/main/java/org/onap/clamp/loop/LoopService.java
+++ b/src/main/java/org/onap/clamp/loop/LoopService.java
@@ -118,6 +118,12 @@ public class LoopService {
     Loop addOperationalPolicy(String loopName, String policyType, String policyVersion) throws IOException {
         Loop loop = getLoop(loopName);
         PolicyModel policyModel = policyModelsService.getPolicyModel(policyType, policyVersion);
+        Set<OperationalPolicy> opPolicySet = loop.getOperationalPolicies();
+        for (OperationalPolicy opPolicy : opPolicySet) {
+        	if (opPolicy.getPolicyModel().equals(policyModel)) {
+        		throw new IllegalArgumentException("This type of Operational Policy is already added to the loop. Please choose another one.");
+        	}
+        }
         if (policyModel == null) {
             return null;
         }