diff --git a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/pom.xml b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/pom.xml
index 496462c287..729ee868bd 100644
--- a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/pom.xml
+++ b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.wso2.carbon.devicemgt</groupId>
         <artifactId>operation-template-mgt</artifactId>
-        <version>5.0.20-SNAPSHOT</version>
+        <version>5.0.21-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/OperationTemplateDAO.java b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/OperationTemplateDAO.java
index d395c4d54c..358fc9c6af 100644
--- a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/OperationTemplateDAO.java
+++ b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/OperationTemplateDAO.java
@@ -36,5 +36,4 @@ public interface OperationTemplateDAO {
 
     void deleteOperationTemplate(int subTypeId, String deviceCode, String operationCode) throws OperationTemplateManagementDAOException;
 
-    boolean isExistsOperationTemplateBySubtypeIdAndOperationCode(int subTypeId, String deviceType, String operationCode) throws OperationTemplateManagementDAOException;
 }
diff --git a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/impl/OperationTemplateDAOImpl.java b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/impl/OperationTemplateDAOImpl.java
index d48a6b4c55..2ad78d9ad7 100644
--- a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/impl/OperationTemplateDAOImpl.java
+++ b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dao/impl/OperationTemplateDAOImpl.java
@@ -180,41 +180,4 @@ public class OperationTemplateDAOImpl implements OperationTemplateDAO {
             throw new OperationTemplateManagementDAOException(msg, e);
         }
     }
-
-    /**
-     * @param subTypeId
-     * @param deviceType
-     * @param operationCode
-     * @return
-     * @throws OperationTemplateManagementDAOException
-     */
-    @Override
-    public boolean isExistsOperationTemplateBySubtypeIdAndOperationCode(int subTypeId, String deviceType,
-                                                                        String operationCode) throws OperationTemplateManagementDAOException {
-        try {
-            String sql = "SELECT * FROM SUB_OPERATION_TEMPLATE WHERE SUB_TYPE_ID = ? AND DEVICE_TYPE = ? AND OPERATION_CODE = ?";
-
-            Connection conn = ConnectionManagerUtils.getDBConnection();
-            try (PreparedStatement stmt = conn.prepareStatement(sql)) {
-                stmt.setInt(1, subTypeId);
-                stmt.setString(2, deviceType);
-                stmt.setString(3, operationCode);
-
-                try (ResultSet rs = stmt.executeQuery()) {
-                    if (rs.next()) {
-                        return true;
-                    }
-                    return false;
-                }
-            } catch (SQLException e) {
-                String msg = "Error occurred while loading operation template.";
-                log.error(e.getMessage());
-                throw new OperationTemplateManagementDAOException(msg, e);
-            }
-        } catch (DBConnectionException e) {
-            String msg = "Error occurred while obtaining DB connection to loading operation template.";
-            log.error(msg);
-            throw new OperationTemplateManagementDAOException(msg, e);
-        }
-    }
 }
diff --git a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dto/OperationTemplateCacheKey.java b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dto/OperationTemplateCacheKey.java
index 2bbbf1a22d..7eee362040 100644
--- a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dto/OperationTemplateCacheKey.java
+++ b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/main/java/io/entgra/device/mgt/operation/template/dto/OperationTemplateCacheKey.java
@@ -21,9 +21,9 @@ package io.entgra.device.mgt.operation.template.dto;
 
 public class OperationTemplateCacheKey {
 
-    int subTypeId;
-    String deviceType;
-    String operationCode;
+    private int subTypeId;
+    private String deviceType;
+    private String operationCode;
 
     public int getSubTypeId() {
         return subTypeId;
diff --git a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/test/java/io/entgra/device/mgt/operation/template/ServiceNegativeTest.java b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/test/java/io/entgra/device/mgt/operation/template/ServiceNegativeTest.java
index fd1e6a5a8d..e5a39b3181 100644
--- a/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/test/java/io/entgra/device/mgt/operation/template/ServiceNegativeTest.java
+++ b/components/operation-template-mgt/io.entgra.device.mgt.operation.template/src/test/java/io/entgra/device/mgt/operation/template/ServiceNegativeTest.java
@@ -50,13 +50,13 @@ public class ServiceNegativeTest extends BaseOperationTemplatePluginTest {
     @Test(description = "This method tests Add Operation template under negative circumstances while missing " +
             "required fields",
             expectedExceptions = {OperationTemplateMgtPluginException.class},
-            expectedExceptionsMessageRegExp = "Error occurred while processing insert operation template.")
+            expectedExceptionsMessageRegExp = "Invalid meter device subtype id: 0")
     public void testAddOperationTemplates() throws OperationTemplateMgtPluginException {
 
         OperationTemplate operationTemplate = new OperationTemplate();
         operationTemplate.setDeviceType(TestUtils.deviceType);
         operationTemplate.setCode(TestUtils.operationCode);
-        operationTemplate.setSubTypeId(1000);
+        operationTemplate.setSubTypeId(0);
         operationTemplate.setOperationDefinition(TestUtils.getOperationDefinition(TestUtils.subtypeId, TestUtils.operationCode));
         operationTemplateService.addOperationTemplate(operationTemplate);
     }
diff --git a/components/operation-template-mgt/pom.xml b/components/operation-template-mgt/pom.xml
index f48dc96d93..cb58177047 100644
--- a/components/operation-template-mgt/pom.xml
+++ b/components/operation-template-mgt/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.wso2.carbon.devicemgt</groupId>
         <artifactId>carbon-devicemgt</artifactId>
-        <version>5.0.20-SNAPSHOT</version>
+        <version>5.0.21-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/features/operation-template-mgt-plugin-feature/io.entgra.device.mgt.operation.template.feature/pom.xml b/features/operation-template-mgt-plugin-feature/io.entgra.device.mgt.operation.template.feature/pom.xml
index 6150a17198..d72b55db35 100644
--- a/features/operation-template-mgt-plugin-feature/io.entgra.device.mgt.operation.template.feature/pom.xml
+++ b/features/operation-template-mgt-plugin-feature/io.entgra.device.mgt.operation.template.feature/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.wso2.carbon.devicemgt</groupId>
         <artifactId>carbon-devicemgt</artifactId>
-        <version>5.0.20-SNAPSHOT</version>
+        <version>5.0.21-SNAPSHOT</version>
         <relativePath>../../../pom.xml</relativePath>
     </parent>
 
diff --git a/features/operation-template-mgt-plugin-feature/pom.xml b/features/operation-template-mgt-plugin-feature/pom.xml
index a41df443a7..beb4317f3e 100644
--- a/features/operation-template-mgt-plugin-feature/pom.xml
+++ b/features/operation-template-mgt-plugin-feature/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <artifactId>carbon-devicemgt</artifactId>
         <groupId>org.wso2.carbon.devicemgt</groupId>
-        <version>5.0.20-SNAPSHOT</version>
+        <version>5.0.21-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>