我在我的VPS上使用Django和MySQL。每当我运行python manage.py migrate时，我会得到以下错误。但是在我的开发服务器上，我使用sqlite，而迁移工作正常。
Running migrations:
Rendering model states... DONE
Applying bloupergroups.0002_auto_20160826_1138...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
utility.execute()
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/migrations/migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards
field,
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/mysql/schema.py", line 50, in add_field
super(DatabaseSchemaEditor, self).add_field(model, field)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 396, in add_field
self.execute(sql, params)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 110, in execute
cursor.execute(sql, params)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/utils.py", line 95, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 112, in execute
return self.cursor.execute(query, args)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/MySQLdb/cursors.py", line 226, in execute
self.errorhandler(self, exc, value)
File "/home/ashish/Env/bloup/local/lib/python2.7/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorvalue
django.db.utils.OperationalError: (1060, "Duplicate column name 'blouper_id'")
我不明白这里的问题是什么。