Path Alias Collision Guard

Path Alias Collision Guard helps keep URL aliases unique and SEO-safe. It stops new colliding or near-duplicate aliases when they are saved and gives administrators tools to find existing problems after migrations, bulk imports, or Pathauto runs.

What it does

• Blocks collisions on save — validation runs for aliases created or updated via the UI, REST/API, Pathauto, and Migrate.
• Normalizes aliases for comparison — trims whitespace, collapses duplicate slashes, and supports optional case-insensitive matching so /About and /about can be treated as duplicates when configured.
• Audit report — review grouped collisions in the admin UI.
• Drush integration — drush path-alias-collision-guard:audit for scripts and CI; exits with code 1 when collision groups exist.

Requirements

• Drupal 10.3+ or 11+
• Drupal core Path Alias module

Configuration

Settings: /admin/config/search/path-alias-collision-guard

Audit report: /admin/config/search/path-alias-collision-guard/audit

Permissions

• Administer path alias collision guard — change module settings
• View path alias collision report — view the audit report

Relationship to other modules

This module does not replace Path, Pathauto, or Redirect. It adds validation and auditing focused on duplicate and near-duplicate path aliases.

License: GPL-2.0-or-later