diff --git a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/h2.sql b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/h2.sql
index bb85e18ffaf..f9c58618315 100644
--- a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/h2.sql
+++ b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/h2.sql
@@ -117,7 +117,8 @@ CREATE TABLE IF NOT EXISTS AP_DEVICE_SUBSCRIPTION(
   PRIMARY KEY (ID),
   CONSTRAINT fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1
   FOREIGN KEY (AP_APP_RELEASE_ID)
-  REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+  REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,
+  CONSTRAINT uq_AP_DEVICE_SUBSCRIPTION UNIQUE (DM_DEVICE_ID, AP_APP_RELEASE_ID)
 );
 CREATE INDEX fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1_idx ON AP_DEVICE_SUBSCRIPTION (AP_APP_RELEASE_ID ASC);
 
diff --git a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mssql.sql b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mssql.sql
index 754eaca1914..0c55006976f 100644
--- a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mssql.sql
+++ b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mssql.sql
@@ -118,7 +118,8 @@ CREATE TABLE AP_DEVICE_SUBSCRIPTION(
     PRIMARY KEY (ID),
     CONSTRAINT fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1
        FOREIGN KEY (AP_APP_RELEASE_ID)
-           REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+           REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,
+    CONSTRAINT uq_AP_DEVICE_SUBSCRIPTION UNIQUE (DM_DEVICE_ID, AP_APP_RELEASE_ID)
 );
 CREATE INDEX fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1_idx ON AP_DEVICE_SUBSCRIPTION (AP_APP_RELEASE_ID ASC);
 
diff --git a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mysql.sql b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mysql.sql
index 6070139961a..54ba58a9fe2 100644
--- a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mysql.sql
+++ b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/mysql.sql
@@ -104,7 +104,8 @@ CREATE TABLE IF NOT EXISTS AP_DEVICE_SUBSCRIPTION(
   DM_DEVICE_ID INTEGER NOT NULL,
   AP_APP_RELEASE_ID INTEGER NOT NULL,
   PRIMARY KEY (ID),
-  CONSTRAINT fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1 FOREIGN KEY (AP_APP_RELEASE_ID) REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+  CONSTRAINT fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1 FOREIGN KEY (AP_APP_RELEASE_ID) REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,
+  CONSTRAINT uq_AP_DEVICE_SUBSCRIPTION UNIQUE (DM_DEVICE_ID, AP_APP_RELEASE_ID)
 );
 CREATE INDEX fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1_idx ON AP_DEVICE_SUBSCRIPTION (AP_APP_RELEASE_ID ASC);
 -- -----------------------------------------------------
diff --git a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/postgresql.sql b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/postgresql.sql
index 946d720dfd5..e8e1dbb2250 100644
--- a/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/postgresql.sql
+++ b/features/application-mgt/io.entgra.application.mgt.server.feature/src/main/resources/dbscripts/cdm/application-mgt/postgresql.sql
@@ -129,7 +129,8 @@ CREATE TABLE IF NOT EXISTS AP_DEVICE_SUBSCRIPTION(
     PRIMARY KEY (ID),
     CONSTRAINT fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1
         FOREIGN KEY (AP_APP_RELEASE_ID)
-            REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+            REFERENCES AP_APP_RELEASE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,
+    CONSTRAINT uq_AP_DEVICE_SUBSCRIPTION UNIQUE (DM_DEVICE_ID, AP_APP_RELEASE_ID)
 );
 CREATE INDEX fk_AP_DEVICE_SUBSCRIPTION_AP_APP_RELEASE1_idx ON AP_DEVICE_SUBSCRIPTION (AP_APP_RELEASE_ID ASC);