class Migration ( migrations . Migration ) :
    dependencies = [
        ( "str" , "str" ) ,
    ]
    operations = [
        migrations . AddField (
            model_name = "str" , ,
            name = "str" ,
            field = models . IntegerField ( blank = True , help_text = "str" , null = True , unique = True , verbose_name = "str" ) ,
        ) ,
    ]

class Migration ( migrations . Migration ) :
    dependencies = [
        ( "str" , "str" ) ,
    ]
    operations = [
        migrations . AddField (
            model_name = "str" ,
            name = "str" ,
            field = models . IntegerField ( blank = True , help_text = "str" , null = True , unique = True , verbose_name = "str" ) ,
        ) ,
    ]

次に示すpythonコードの誤りを修正しなさい。