Support for Drupal 7 is ending on 5 January 2025—it’s time to migrate to Drupal 10! Learn about the many benefits of Drupal 10 and find migration tools in our resource center.
In custom_breadcrumbs.install, custom_breadcrumbs_update_6001() and other custom_breadcrumbs_update should have 7xxx version number because we are on Drupal 7 version
http://api.drupal.org/api/drupal/modules--system--system.api.php/functio...