diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
index d987e14..621bb63 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
@@ -68,6 +68,8 @@ public function preSave() {
    * {@inheritdoc}
    */
   public function isEmpty() {
+    // We cannot use the parent implementation from StringItem as it does not
+    // consider the additional 'existing' property that PasswordItem contains.
     $value = $this->get('value')->getValue();
     $existing = $this->get('existing')->getValue();
     return $value === NULL && $existing === NULL;
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index 91a908e..dd55b49 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -70,7 +70,6 @@ function user_install() {
     ->create(array(
       'uid' => 0,
       'status' => 0,
-      'name' => '',
     ))
     ->save();