Please address the comments from this code review:
## Overall Comments
- Extract the PageUrl copy logic into a shared helper or integrate it with Page.copy to avoid duplication and keep slug/path generation in one place.
- Instead of using model_to_dict to clone PageUrl, explicitly select and set only the fields you need (e.g. slug, path) so you don’t inadvertently copy metadata or PKs.
- Add a guard or fallback when a source‐language PageUrl is missing (rather than unconditionally calling `.get()`), to avoid raising DoesNotExist during the copy.

## Individual Comments

### Comment 1
<location> `cms/management/commands/subcommands/copy.py:115` </location>
<code_context>
+
+                    new_url["slug"] = get_available_slug(site, path, to_lang)
+                    new_url["path"] = '%s/%s' % (base, new_url["slug"]) if base else new_url["slug"]
+                    PageUrl.objects.with_user(user).create(**new_url)
+
                 if copy_content:
</code_context>

<issue_to_address>
Consider handling database errors during PageUrl creation.

Currently, any database error during PageUrl creation will stop execution. Consider catching exceptions to log errors or allow processing to continue for other pages, based on the desired behavior.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
                    new_url["slug"] = get_available_slug(site, path, to_lang)
                    new_url["path"] = '%s/%s' % (base, new_url["slug"]) if base else new_url["slug"]
                    PageUrl.objects.with_user(user).create(**new_url)

                if copy_content:
=======
                    import logging
                    from django.db import DatabaseError

                    new_url["slug"] = get_available_slug(site, path, to_lang)
                    new_url["path"] = '%s/%s' % (base, new_url["slug"]) if base else new_url["slug"]
                    try:
                        PageUrl.objects.with_user(user).create(**new_url)
                    except DatabaseError as e:
                        logging.error("Failed to create PageUrl for slug '%s': %s", new_url["slug"], str(e))
                        # Optionally, you could add more error handling here (e.g., collect failed slugs, notify user, etc.)

                if copy_content:
>>>>>>> REPLACE

</suggested_fix>