Fixed #26647 -- Included the state of all applied migrations when migrating forward.

Thanks Jasper Maes for the detailed report.

tests/migrations/migrations_test_apps/mutate_state_b/migrations/0001_initial.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.SeparateDatabaseAndState([], [
+            migrations.CreateModel(
+                name='B',
+                fields=[
+                    ('id', models.AutoField(serialize=False, verbose_name='ID', auto_created=True, primary_key=True)),
+                ],
+            ),
+        ])
+    ]

tests/migrations/migrations_test_apps/mutate_state_b/migrations/0002_add_field.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mutate_state_b', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.SeparateDatabaseAndState([], [
+            migrations.AddField(
+                model_name='B',
+                name='added',
+                field=models.TextField(),
+            ),
+        ])
+    ]