diff --git a/app/Imports/GoodsSkusImport.php b/app/Imports/GoodsSkusImport.php
index 4db9e8c..9c01559 100644
--- a/app/Imports/GoodsSkusImport.php
+++ b/app/Imports/GoodsSkusImport.php
@@ -43,6 +43,7 @@ class GoodsSkusImport implements ToCollection, SkipsEmptyRows
             $brands[] = $row[2];
             $goodsCodes[] = $row[3];
         }
+        unset($row);
         $validator = Validator::make($collection, [
             '*.0' => ['required', 'string', 'max:191'],
             '*.1' => ['required', 'string', 'max:191', 'exists:goods_types,name'],