diff -u b/core/modules/tracker/tracker.module b/core/modules/tracker/tracker.module
--- b/core/modules/tracker/tracker.module
+++ b/core/modules/tracker/tracker.module
@@ -149,7 +149,7 @@
  *   has permission to access the content.
  */
 function _tracker_myrecent_access(AccountInterface $account) {
-  @trigger_error('_tracker_myrecent_access() is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0. See https://www.drupal.org/node/2550581.', E_USER_DEPRECATED);
+  @trigger_error('_tracker_myrecent_access() is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0.', E_USER_DEPRECATED);
   // This path is only allowed for authenticated users looking at their own content.
   return $account->id() && (\Drupal::currentUser()->id() == $account->id()) && $account->hasPermission('access content');
 }
@@ -171,7 +171,7 @@
  *   has permission to access the content.
  */
 function _tracker_user_access($account) {
-  @trigger_error('_tracker_user_access() is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0. See https://www.drupal.org/node/2550581.', E_USER_DEPRECATED);
+  @trigger_error('_tracker_user_access() is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0.', E_USER_DEPRECATED);
   return $account->access('view') && $account->hasPermission('access content');
 }