Duplicated key
Would you mind sharing your model definiton?
 ``` python
class BaseModel(peewee.Model):

    class Meta:
        database = database

class Test(BaseModel):
    name = peewee.CharField()

Test.create_table()
```

Table created in MySQL by create_table method:

``` sql
CREATE TABLE `test` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `test_id` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
```

Key on 'id' column is duplicated (PRIMARY KEY and UNIQUE KEY).
