diff --git a/core/modules/system/config/system.logging.yml b/core/modules/system/config/system.logging.yml
index 3ecc76c..d836a56 100644
--- a/core/modules/system/config/system.logging.yml
+++ b/core/modules/system/config/system.logging.yml
@@ -1 +1 @@
-error_level: all
+error_level: hide
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 5a0aade..da78dbd 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1691,7 +1691,7 @@ function system_update_8014() {
   }
   else {
     // Set error_level to the default value.
-    $config->set('error_level', 'all');
+    $config->set('error_level', 'hide');
   }
   $config->save();
 }