diff --git a/src/Settlement/Entity/WalletTransaction.php b/src/Settlement/Entity/WalletTransaction.php
index 96f83251..a73382fb 100644
--- a/src/Settlement/Entity/WalletTransaction.php
+++ b/src/Settlement/Entity/WalletTransaction.php
@@ -12,6 +12,8 @@ use Symfony\Component\Uid\Uuid;
 #[ORM\Table(name: 'wallet_transactions')]
 #[ORM\Index(columns: ['user_id', 'created_at'], name: 'idx_wallet_user_date')]
 #[ORM\Index(columns: ['user_id', 'type'], name: 'idx_wallet_user_type')]
+// دفترِ per-محیطِ یک شخص: WalletTransactionRepository::findByUserForEnvironment()
+#[ORM\Index(columns: ['user_id', 'recorded_entity_type', 'recorded_entity_id'], name: 'idx_wallet_user_recorded_entity')]
 class WalletTransaction
 {
     public const TYPE_CREDIT = 'credit';