diff --git a/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/exception/IExceptionMessage.java b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/exception/IExceptionMessage.java
new file mode 100644
index 0000000..7102f7a
--- /dev/null
+++ b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/exception/IExceptionMessage.java
@@ -0,0 +1,26 @@
+/*
+ * Axelor Business Solutions
+ *
+ * Copyright (C) 2019 Axelor (<http://axelor.com>).
+ *
+ * This program is free software: you can redistribute it and/or  modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.axelor.apps.qvm.exception;
+
+/** Interface of Exceptions. Enum all exception of axelor-human-resource. */
+public interface IExceptionMessage {
+
+    static final String ORIGIN_ALREDY_USED = /*$$(*/
+            "origin alredy used : %s" /*)*/;
+
+}
\ No newline at end of file
diff --git a/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/QvmOperationServiceImpl.java b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/QvmOperationServiceImpl.java
index b8efb86..5d5439f 100644
--- a/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/QvmOperationServiceImpl.java
+++ b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/QvmOperationServiceImpl.java
@@ -28,11 +28,18 @@ import com.axelor.i18n.I18n;
 import com.axelor.inject.Beans;
 import com.google.inject.Inject;
 import com.google.inject.persist.Transactional;
+import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import com.axelor.apps.qvm.exception.IExceptionMessage;
 
 public class QvmOperationServiceImpl implements QvmOperationService {
 
+  private final Logger log = LoggerFactory.getLogger(QvmOperationServiceImpl.class);
   @Inject protected SequenceService sequenceService;
 
+  @Inject
+  private QvmOperationRepository qvmOperationRepo;
   @Transactional
   public QvmOperation createCalibrationSeq(Company company) throws AxelorException {
 
@@ -103,36 +110,46 @@ public class QvmOperationServiceImpl implements QvmOperationService {
     return calibration;
   }
 
-  public QvmOperation createNextOperation(QvmOperation operation, Long userId) {
+  public QvmOperation createNextOperation(QvmOperation operation, Long userId) throws AxelorException{
     QvmOperation nextOperation = Beans.get(QvmOperationRepository.class).copy(operation, true);
     if (operation != null) {
-      try {
-        nextOperation.setStatusSelect(1);
-        nextOperation.setOperationOrigin(operation.getSerialNumber());
-        nextOperation.setCreationType(2);
-        nextOperation.setPastOperationDate(operation.getOperationDate());
-        nextOperation.setOperationDate(operation.getOperationDueDate());
-        if (operation.getOperationFrequency() == 1) {
-          nextOperation.setOperationDueDate(operation.getOperationDueDate().plusYears(1));
-          nextOperation.setCountdown(364);
+      List<QvmOperation> operations = qvmOperationRepo.all()
+              .filter("self.operationOrigin = :serialNumber")
+              .bind("serialNumber", operation.getSerialNumber())
+              .fetch();
+      int size = operations.size();
+      if (size == 0){
+        log.debug("Creating next operation");
+        try{
+          nextOperation.setStatusSelect(1);
+          nextOperation.setOperationOrigin(operation.getSerialNumber());
+          nextOperation.setCreationType(2);
+          nextOperation.setPastOperationDate(operation.getOperationDate());
+          nextOperation.setOperationDate(operation.getOperationDueDate());
+          if (operation.getOperationFrequency() == 1){
+            nextOperation.setOperationDueDate(operation.getOperationDueDate().plusYears(1));
+            nextOperation.setCountdown(364);}
+          if (operation.getOperationFrequency() == 2){
+            nextOperation.setOperationDueDate(operation.getOperationDueDate().plusMonths(1));
+            nextOperation.setCountdown(31);}
+          if (operation.getOperationFrequency() == 3){
+            nextOperation.setOperationDueDate(operation.getOperationDueDate().plusMonths(6));
+            nextOperation.setCountdown(183);}
+          nextOperation.setSerialNumber(null);
+          nextOperation.setCreationType(2);
         }
-        if (operation.getOperationFrequency() == 2) {
-          nextOperation.setOperationDueDate(operation.getOperationDueDate().plusMonths(1));
-          nextOperation.setCountdown(31);
-        }
-        if (operation.getOperationFrequency() == 3) {
-          nextOperation.setOperationDueDate(operation.getOperationDueDate().plusMonths(6));
-          nextOperation.setCountdown(183);
-        }
-        System.out.println(
-            "operation.getOperationFrequency : " + operation.getOperationFrequency());
-        nextOperation.setSerialNumber(null);
-        nextOperation.setCreationType(2);
-      } catch (Exception exception) {
-        System.out.println(exception);
+        catch (Exception exception){
+          log.error("Error while creating next operation");
+          System.out.println(exception);
+        }}else{
+        log.debug("Origin alredy used");
+        throw new AxelorException(
+                TraceBackRepository.CATEGORY_NO_UNIQUE_KEY,
+                I18n.get(IExceptionMessage.ORIGIN_ALREDY_USED),
+                operation.getSerialNumber());
       }
     }
-    // Beans.get(QvmOperationRepository.class).save(nextOperation);
+    System.out.println("Create next operation : "+nextOperation);
     return nextOperation;
   }
 }