diff --git a/core/modules/block/block.install b/core/modules/block/block.install
index 9d3270f..de652be 100644
--- a/core/modules/block/block.install
+++ b/core/modules/block/block.install
@@ -14,6 +14,7 @@
  * Update block visibility context mapping.
  */
 function block_update_8001() {
+  // These 3 are all the contexts that Drupal core provides.
   $context_service_id_map = [
     'language' => 'language.current_language_context',
     'node' => 'node.node_route_context',
@@ -79,7 +80,7 @@ function block_update_8001() {
   }
 
   if ($disabled_blocks) {
-    $message = \Drupal::translation()->translate('Encountered an unexpected context mapping key, one or more mappings could not be updated. Please manually review your visibility settings for the following blocks:');
+    $message = \Drupal::translation()->translate('Encountered an unexpected context mapping key, one or more mappings could not be updated. Please manually review your visibility settings for the following blocks, which are disabled now:');
     $message .= '<ul>';
     foreach ($disabled_blocks as $disabled_block_id => $disabled_block_label) {
       $message .= '<li>' . $disabled_block_label . ' (' . \Drupal::translation()->translate('Visibility') . ': ' . implode(', ', $problematic_visibility_plugins[$disabled_block_id]) . ')</li>';