diff --git a/workflow/engine/classes/model/DashletInstance.php b/workflow/engine/classes/model/DashletInstance.php
index bc3f4f4b5..0244c966a 100644
--- a/workflow/engine/classes/model/DashletInstance.php
+++ b/workflow/engine/classes/model/DashletInstance.php
@@ -43,23 +43,37 @@ class DashletInstance extends BaseDashletInstance
                 unset($data[$field]);
             }
         }
-        if (!empty($additionalFields)) {
-            $data['DAS_INS_ADDITIONAL_PROPERTIES'] = serialize($additionalFields);
-        } else {
-            $data['DAS_INS_ADDITIONAL_PROPERTIES'] = '';
-        }
+
         $connection = Propel::getConnection(DashletInstancePeer::DATABASE_NAME);
+
         try {
             if (!isset($data['DAS_INS_UID'])) {
                 $data['DAS_INS_UID'] = '';
             }
             if ($data['DAS_INS_UID'] == '') {
-                $data['DAS_INS_UID'] = G::generateUniqueID();
-                $data['DAS_INS_CREATE_DATE'] = date('Y-m-d H:i:s');
                 $dashletInstance = new DashletInstance();
+
+                $data['DAS_INS_UID'] = G::generateUniqueID();
+                $data['DAS_INS_ADDITIONAL_PROPERTIES'] = (!empty($additionalFields))? serialize($additionalFields) : '';
+                $data['DAS_INS_CREATE_DATE'] = date('Y-m-d H:i:s');
+
                 $msg = 'CreateDashletInstance';
             } else {
                 $dashletInstance = DashletInstancePeer::retrieveByPK($data['DAS_INS_UID']);
+
+                if (!empty($additionalFields)) {
+                    $arrayAdditionalProperties = [];
+
+                    if ($dashletInstance->getDasInsAdditionalProperties() != '') {
+                        $arrayAux = unserialize($dashletInstance->getDasInsAdditionalProperties());
+                        $arrayAdditionalProperties = (is_array($arrayAux))? $arrayAux : $arrayAdditionalProperties;
+                    }
+
+                    $additionalFields = array_merge($arrayAdditionalProperties, $additionalFields);
+
+                    $data['DAS_INS_ADDITIONAL_PROPERTIES'] = serialize($additionalFields);
+                }
+
                 $msg = 'UpdateDashletInstance';
             }
             $data['DAS_INS_UPDATE_DATE'] = date('Y-m-d H:i:s');