--- a/src/main/java/org/mpi/openmind/repository/services/AbstractPersistenceService.java	Fri Oct 28 18:20:06 2016 +0200
+++ b/src/main/java/org/mpi/openmind/repository/services/AbstractPersistenceService.java	Fri Oct 28 19:58:18 2016 +0200
@@ -550,34 +550,35 @@
 	 * 
 	 * @param entity
 	 */
-	public void removeEntCurrentVersion(Long entId, String type)
-			throws Exception {
-		logger.info("Deleting entity [ID=" + entId + ", type=" + type
-				+ "]. But keeping history in DB.");
-		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
-		session.getTransaction().begin();
+    public void removeEntCurrentVersion(Long entId, String type) throws Exception {
+        logger.info("Deleting entity [ID=" + entId + ", type=" + type + "]. But keeping history in DB.");
+        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
+        try {
+            session.getTransaction().begin();
 
-		if (entId != null) {
-			//this method get the current version. Related to the relation, the time_modification is not consider,
-			//because it it producing problems. 
-			List<Entity> previousEntityList = 
-					this.getEntities(session, entId,
-							Node.SYS_STATUS_CURRENT_VERSION, 
-							type, null, false);
-			if (previousEntityList.size() > 0) {
-				if (previousEntityList.size() > 1) {
-					System.err
-							.println("[PersistenceService.saveEntity] found more than one current entities!");
-				}
-
-				Entity previousEntity = previousEntityList.get(0);
-				logger.info("Saving previous entity: " + previousEntity);
-				this.persistEntityAsPrevious(session, previousEntity);
-			}
-		}
-		session.getTransaction().commit();
-	}
-
+            if (entId != null) {
+                /*
+                 * this method get the current version. Related to the relation,
+                 * the time_modification is not consider, because it it
+                 * producing problems.
+                 */
+                List<Entity> previousEntityList = this.getEntities(session, entId, Node.SYS_STATUS_CURRENT_VERSION,
+                        type, null, false);
+                if (previousEntityList.size() > 0) {
+                    if (previousEntityList.size() > 1) {
+                        logger.error("Found more than one current entities!");
+                    }
+                    Entity previousEntity = previousEntityList.get(0);
+                    logger.info("Saving previous entity: " + previousEntity);
+                    this.persistEntityAsPrevious(session, previousEntity);
+                }
+            }
+        } catch (Exception e) {
+            logger.error(e);
+        } finally {
+            session.getTransaction().commit();
+        }
+    }
 
 	/**
 	 * Save the entity to the database.
@@ -612,7 +613,7 @@
 			List<Entity> previousEntityList = this.getEntities(session, entity.getId(), Node.SYS_STATUS_CURRENT_VERSION, entity.getType(), null, false);
 			if (previousEntityList.size() > 0) {
 				if (previousEntityList.size() > 1) {
-					logger.error("[PersistenceService.saveEntity] found more than one current entities!");
+					logger.error("Found more than one current entities!");
 				}
 				// set the first current entity as previous 
 				Entity previousEntity = previousEntityList.get(0);