Before you update to Drupal 8.8 or Lightning 8.x-4.100, if you have the contributed Pathauto module enabled, you must update to the latest version of Pathauto. Failure to update Pathauto before updating core could result in data loss.
Due to this incompatibility, Drupal 8.8.0 has a documented conflict with Pathauto 8.x-1.5 or lower and requires an update for Drupal 8.8+ applications to continue operating as anticipated. Lightning 8.x-4.100 also calls out this incompatibility in its Drupal.org update.
In addition, the Pathauto update should be completed without dependencies, and the database should be updated before implementing the Drupal Core update.
This is for Drupal 8.8+ only and will not affect Drupal 7.
- Drupal 8.8+
- Lightning 8.x-4.100
- Pathauto 8.x-1.5 or lower module
Update to the latest version of Pathauto module before you update to Drupal 8.8.0 or Lightning 8.x-4.100.