diff -u b/core/modules/contact/contact.install b/core/modules/contact/contact.install
--- b/core/modules/contact/contact.install
+++ b/core/modules/contact/contact.install
@@ -50,12 +50,12 @@
       if ($category->selected) {
         // Save default category.
         config('contact.settings')
-          ->set('default_category', $category->idj)
+          ->set('default_category', $category->id)
           ->save();
       }
       // Save the config object.
       config('contact.category.' . $category->id)
-        ->set('id', $category->name)
+        ->set('id', $category->id)
         ->set('label', $category->category)
         ->set('recipients', $category->recipients)
         ->set('reply', $category->reply)