From 664b3d4d43ddb6360e9da26f0a04904aede63120 Mon Sep 17 00:00:00 2001
From: charitha <charitha.ws@gmail.com>
Date: Thu, 6 Oct 2016 20:32:09 +0530
Subject: [PATCH] Fix issue in duplicate mapping

---
 .../mgt/core/service/GroupManagementProviderServiceImpl.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java
index 11ea9592259..1753f9696ab 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java
@@ -616,7 +616,9 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
                 if (device == null) {
                     throw new DeviceNotFoundException("Device not found for id '" + deviceIdentifier.getId() + "'");
                 }
-                this.groupDAO.addDevice(groupId, device.getId(), tenantId);
+                if (!this.groupDAO.isDeviceMappedToGroup(groupId, device.getId(), tenantId)){
+                    this.groupDAO.addDevice(groupId, device.getId(), tenantId);
+                }
             }
             GroupManagementDAOFactory.commitTransaction();
         } catch (DeviceManagementException e) {