diff --git a/sapl/materia/migrations/0012_auto_20170815_1238.py b/sapl/materia/migrations/0012_auto_20170815_1238.py
new file mode 100644
index 000000000..5f62c1670
--- /dev/null
+++ b/sapl/materia/migrations/0012_auto_20170815_1238.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.12 on 2017-08-15 12:38
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('materia', '0011_auto_20170808_1034'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='proposicao',
+            name='tipo',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='materia.TipoProposicao', verbose_name='Tipo'),
+        ),
+        migrations.AlterField(
+            model_name='tramitacao',
+            name='status',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='materia.StatusTramitacao', verbose_name='Status'),
+        ),
+    ]
diff --git a/sapl/materia/models.py b/sapl/materia/models.py
index 1408bd445..c1cabfe18 100644
--- a/sapl/materia/models.py
+++ b/sapl/materia/models.py
@@ -846,6 +846,10 @@ class Tramitacao(models.Model):
     )
 
     status = models.ForeignKey(StatusTramitacao, on_delete=models.PROTECT,
+                               # TODO PÓS MIGRACAO INICIAL (vide #1381)
+                               # não nulo quando todas as
+                               # bases tiverem sido corrigidas
+                               null=True,
                                verbose_name=_('Status'))
     materia = models.ForeignKey(MateriaLegislativa, on_delete=models.PROTECT)
     data_tramitacao = models.DateField(verbose_name=_('Data Tramitação'))