Application theme not required. Set default. Removed extra spaces and lines.

api/migrations/0006_auto_20190619_1524.py

+# Generated by Django 2.1.5 on 2019-06-19 15:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0005_auto_20190619_1012'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='application',
+            name='theme',
+            field=models.IntegerField(blank=True, default=1),
+        ),
+    ]