Update old migration

stages/migrations/0025_section_has_stages.py

@@ -1,5 +1,3 @@
-# Generated by Django 2.2.6 on 2019-11-20 13:30
-
 from django.db import migrations, models
 
 
@@ -15,4 +13,9 @@ class Migration(migrations.Migration):
             name='has_stages',
             field=models.BooleanField(default=False, verbose_name='Planifie la PP sur ce site'),
         ),
+        migrations.AlterField(
+            model_name='period',
+            name='section',
+            field=models.ForeignKey(limit_choices_to={'has_stages': True}, on_delete=models.deletion.PROTECT, to='stages.Section', verbose_name='Filière'),
+        ),
     ]