Fix locations integrity issue

ccdb/locations/migrations/0002_remove_site_fk_dupes.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('locations', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='municipallocation',
+            name='site',
+        ),
+        migrations.AlterField(
+            model_name='studylocation',
+            name='site',
+            field=models.ForeignKey(to='locations.Site'),
+        ),
+    ]