diff --git a/Model.php b/Model.php
index 6e8cb21..508b09a 100644
--- a/Model.php
+++ b/Model.php
@@ -280,7 +280,7 @@ class Model extends Base\Model
 
         $relation = di(Relation::class);
 
-        $primaryKey = str_replace('\\\\', '_', $modelName) . '_' . $foreignKey . '_' . $value;
+        $primaryKey = str_replace('\\', '_', $modelName) . '_' . $foreignKey . '_' . $value;
         if (!$relation->hasIdentification($primaryKey)) {
             $relation->bindIdentification($primaryKey, $modelName::query()->where([$foreignKey => $value]));
         }
@@ -341,7 +341,7 @@ class Model extends Base\Model
 
         $relation = di(Relation::class);
 
-        $primaryKey = str_replace('\\\\', '_', $modelName) . '_' . $foreignKey . '_' . implode('_', $value);
+        $primaryKey = str_replace('\\', '_', $modelName) . '_' . $foreignKey . '_' . implode('_', $value);
         if (!$relation->hasIdentification($primaryKey)) {
             $relation->bindIdentification($primaryKey, $modelName::query()->whereIn($foreignKey, $value));
         }