diff --git a/django/db/migrations/loader.py b/django/db/migrations/loader.py
index 923202a..45e8f55 100644
a
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b
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class MigrationLoader(object):
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117 | 117 | break |
118 | 118 | self.disk_migrations[app_config.label, migration_name] = migration_module.Migration(migration_name, app_config.label) |
119 | 119 | if south_style_migrations: |
| 120 | if app_config.label in self.migrated_apps: |
| 121 | raise BadMigrationError( |
| 122 | "Migrated app %s contains south migrations. " |
| 123 | "Make sure all numbered south migrations are deleted prior to running the " |
| 124 | "django migration system. For more information see: " |
| 125 | "https://docs.djangoproject.com/en/1.7/topics/migrations/#upgrading-from-south" |
| 126 | % app_config.label |
| 127 | ) |
120 | 128 | self.unmigrated_apps.add(app_config.label) |
121 | 129 | |
122 | 130 | def get_migration(self, app_label, name_prefix): |