diff --git a/users/models.py b/users/models.py
index 2bb7decd..bc959a21 100755
--- a/users/models.py
+++ b/users/models.py
@@ -591,11 +591,21 @@ class User(RevMixin, FieldPermissionModelMixin, AbstractBaseUser,
 
     @classmethod
     def mass_archive(cls, users_list):
+        """Mass Archive several users, take a queryset
+        Copy Queryset to avoid eval problem with queryset update"""
+        #Force eval of queryset
+        bool(users_list)
+        users_list = users_list.all()
         cls.mass_unassign_ips(users_list)
         users_list.update(state=User.STATE_ARCHIVE)
 
     @classmethod
     def mass_full_archive(cls, users_list):
+        """Mass Archive several users, take a queryset
+        Copy Queryset to avoid eval problem with queryset update"""
+        #Force eval of queryset
+        bool(users_list)
+        users_list = users_list.all()
         cls.mass_unassign_ips(users_list)
         cls.mass_delete_data(users_list)
         users_list.update(state=User.STATE_FULL_ARCHIVE)
diff --git a/users/views.py b/users/views.py
index 7c8149b5..ad8543b5 100644
--- a/users/views.py
+++ b/users/views.py
@@ -785,14 +785,13 @@ def mass_archive(request):
         to_archive_list = User.objects.exclude(id__in=all_has_access()).exclude(id__in=all_has_access(search_time=date)).exclude(state=User.STATE_NOT_YET_ACTIVE).exclude(state=User.STATE_FULL_ARCHIVE)
         if not full_archive:
             to_archive_list = to_archive_list.exclude(state=User.STATE_ARCHIVE)
-        number_to_archive = to_archive_list.count()
         if "valider" in request.POST:
             if full_archive:
                 User.mass_full_archive(to_archive_list)
             else:
                 User.mass_archive(to_archive_list)
             messages.success(request, _("%s users were archived.") %
-                number_to_archive
+                to_archive_list.count()
             )
             return redirect(reverse('users:index'))
         to_archive_list = re2o_paginator(request, to_archive_list, pagination_number)