diff --git a/management/commands/import_nk15.py b/management/commands/import_nk15.py
index e79f676..7b8e7de 100644
--- a/management/commands/import_nk15.py
+++ b/management/commands/import_nk15.py
@@ -136,6 +136,8 @@ def import_boutons(cur,map_idbde):
     cur.execute("SELECT * FROM boutons;")
     for row in cur:
         cat, created = TemplateCategory.objects.get_or_create(name=row["categorie"])
+        if created:
+            cat.save()
         obj_dict = {
             "pk": row["id"],
             "name": row["label"],
@@ -149,15 +151,15 @@ def import_boutons(cur,map_idbde):
             with transaction.atomic(): # required for error management
                 button = TransactionTemplate.objects.create(**obj_dict)
         except IntegrityError as e:
+            # button with the same name is not possible in NK20.
             if "unique" in e.args[0]:
                 qs = Club.objects.filter(note__id=map_idbde[row["destinataire"]]).values('name')
                 note_name = qs[0]["name"]
-                obj_dict["name"] = ' '.join([obj_dict["name"],note_name])
+                #rename button name
+                obj_dict["name"] ="{} {}".format(obj_dict["name"],note_name)
                 button = TransactionTemplate.objects.create(**obj_dict)
             else:
                 raise(e)
-        if created:
-            cat.save()
         button.save()
 
 
@@ -200,12 +202,15 @@ def import_aliases(cur,map_idbde):
         obj_dict = {
             "note_id":map_idbde[row["idbde"]],
             "name":alias_name_good,
+            "normalized_name":Alias.normalize(alias_name_good)
         }
         try:
             with transaction.atomic():
-                alias =  Alias.objects.create(**obj_dict)
+                alias, created =  Alias.objects.get_or_create(**obj_dict)
+                print(alias)
         except IntegrityError as e:
             if "unique" in e.args[0]:
+                print("error, {}".format(alias))
                 continue
             else:
                 raise(e)