diff --git a/app/Models/Booking.php b/app/Models/Booking.php
index b190e349..69b8a745 100644
--- a/app/Models/Booking.php
+++ b/app/Models/Booking.php
@@ -102,7 +102,7 @@ class Booking extends AbstractModel implements Documentable, Transactionable
      */
     public function bills(): hasManyDeep
     {
-        return $this->hasManyDeep(Transaction::class, [Transaction::class.' as alias']);
+        return $this->hasManyDeep(Transaction::class, [Transaction::class.' as alias'], [['owner_type', 'owner_id'], ['owner_type', 'owner_id']], [null, null]);
     }
 
     protected static function booted()