Relationship goes the wrong way.

bikeshop_project/registration/migrations/0006_remove_member_membership.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2016-05-31 02:31
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('registration', '0005_member_membership'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='member',
+            name='membership',
+        ),
+    ]

bikeshop_project/registration/models.py

@@ -59,13 +59,6 @@ class Member(AbstractBaseUser, PermissionsMixin):
     waiver = models.DateTimeField(null=True, blank=True)
     is_active = models.BooleanField(default=True)
     is_admin = models.BooleanField(default=False)
-    membership = models.OneToOneField(
-        'core.Membership',
-        on_delete=models.CASCADE,
-        related_name='member',
-        blank=True,
-        null=True
-    )
 
     objects = CustomMemberManager()