diff --git a/common/config/main.php b/common/config/main.php
index 9b72124..d5046ed 100644
--- a/common/config/main.php
+++ b/common/config/main.php
@@ -24,10 +24,7 @@ return [
             'db' => 'db', // DB connection component or its config
             'tableName' => '{{%queue4}}', // Table name
             'channel' => 'queue4', // Queue channel key
-            'mutex' => [
-                'class' => \yii\mutex\MysqlMutex::class,
-                'mutex' => 'queue4_',
-            ],
+            'mutex' => \yii\mutex\MysqlMutex::class,
             'ttr' => 5 * 60, // Max time for job execution
             'attempts' => 3, // Max number of attempts
             'as log' => \yii\queue\LogBehavior::class,