diff -u b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
--- b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
@@ -116,7 +116,7 @@
     if (isset($current_core_extension['profile'])) {
       // Ensure the active profile is not changing.
       if ($current_core_extension['profile'] !== $core_extension['profile']) {
-        $config_importer->logError($this->t('Cannot change the install profile from %new_profile to %profile once Drupal is installed.', ['%profile' => $install_profile, '%new_profile' => $core_extension['profile']]));
+        $config_importer->logError($this->t('Cannot change the install profile from %new_profile to %profile once Drupal is installed.', ['%profile' => $current_core_extension['profile'], '%new_profile' => $core_extension['profile']]));
       }
     }