diff -u b/core/modules/migrate/migrate.install b/core/modules/migrate/migrate.install
--- b/core/modules/migrate/migrate.install
+++ b/core/modules/migrate/migrate.install
@@ -17,10 +17,8 @@
   $config_factory = \Drupal::configFactory();
   foreach ($config_factory->listAll('migrate.migration.') as $migration_config_name) {
     $migration = $config_factory->getEditable($migration_config_name);
-    if ($migration->get('load')) {
-      $migration->clear('load');
-      $migration->save(TRUE);
-    }
+    $migration->clear('load');
+    $migration->save(TRUE);
   }
 
   return t('Load plugin references removed.');