diff --git a/library/think/Model.php b/library/think/Model.php
index d7f91db0..6119d964 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -1297,7 +1297,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 $auto = true;
             }
             foreach ($dataSet as $key => $data) {
-                if (!empty($auto) && isset($data[$pk])) {
+                if ($this->isUpdate || (!empty($auto) && isset($data[$pk]))) {
                     $result[$key] = self::update($data, [], $this->field);
                 } else {
                     $result[$key] = self::create($data, $this->field);