Integrity Constraint Violation Db Schema Cache

Привет,

Использую кеширование схемы БД (и не только), вот мой /config/main.php:


'cache' => array(

    'class' => 'system.caching.CDbCache',

    'cacheTableName' => 'cache',

    'connectionID' => 'db',

    //'autoCreateCacheTable' => true,

),

'db' => array(

    'connectionString' => 'mysql:host=***;dbname=***',

    'username' => '****',

    'password' => '***',

    'charset' => 'utf8',

    'schemaCachingDuration' => 3600,

    'enableParamLogging' => true,

    'enableProfiling' => true,

    'emulatePrepare' => true,

),



Иногда (раз в месяц) на продакшне возникает ошибка:

[spoiler]2012/11/23 01:26:02 [error] [system.db.CDbCommand]

CDbCommand::execute() failed: SQLSTATE[23000]: Integrity constraint

violation: 1062 Duplicate entry ‘6e0f86ff6b54d1726dabc69930f49461’ for

key 1. The SQL statement executed was: INSERT INTO cache

(id,expire,value) VALUES

(‘6e0f86ff6b54d1726dabc69930f49461’,1353666362,:value). Bound with

:value=‘a:2:{i:0;O:17:“CMysqlTableSchema”:9:{s:10:“schemaName”;N;s:4:“name”;s:7:“setting”;s:7:“rawName”;s:9:"setting";s:10:“primaryKey”;s:3:“key”;s:12:“sequenceName”;N;s:11:“foreignKeys”;a:0:{}s:7:“columns”;a:2:{s:3:“key”;O:18:“CMysqlColumnSchema”:14:{s:4:“name”;s:3:“key”;s:7:“rawName”;s:5:"key";s:9:“allowNull”;b:0;s:6:“dbType”;s:11:“varchar(20)”;s:4:“type”;s:6:“string”;s:12:“defaultValue”;N;s:4:“size”;i:20;s:9:“precision”;i:20;s:5:“scale”;N;s:12:“isPrimaryKey”;b:1;s:12:“isForeignKey”;b:0;s:13:“autoIncrement”;b:0;s:14:"’

. “\0” . ‘CComponent’ . “\0” . ‘_e";N;s:14:"’ . “\0” . ‘CComponent’ .

"\0" .

‘_m";N;}s:5:“value”;O:18:“CMysqlColumnSchema”:14:{s:4:“name”;s:5:“value”;s:7:“rawName”;s:7:"value";s:9:“allowNull”;b:1;s:6:“dbType”;s:12:“varchar(250)”;s:4:“type”;s:6:“string”;s:12:“defaultValue”;N;s:4:“size”;i:250;s:9:“precision”;i:250;s:5:“scale”;N;s:12:“isPrimaryKey”;b:0;s:12:“isForeignKey”;b:0;s:13:“autoIncrement”;b:0;s:14:"’

. “\0” . ‘CComponent’ . “\0” . ‘_e";N;s:14:"’ . “\0” . ‘CComponent’ .

“\0” . ‘_m";N;}}s:14:"’ . “\0” . ‘CComponent’ . “\0” . ‘_e";N;s:14:"’

. “\0” . ‘CComponent’ . “\0” . ‘_m";N;}i:1;N;}’.[/spoiler]

Таблица cache:

[sql]CREATE TABLE cache (

`id` CHAR(128) NOT NULL,


`expire` INT(11) NULL DEFAULT NULL,


`value` LONGBLOB NULL,


PRIMARY KEY (`id`)

)

COLLATE=‘latin1_swedish_ci’

ENGINE=MyISAM;[/sql]

PHP 5.3.18, yii 1.1.12, MySQL 5.0.77

Подскажите, в чем причина ошибки.