agenda-files now without duplicates

config.org

@@ -1088,7 +1088,8 @@ org-roam-db-sync
       "Add all org roam files with #+filetags: Project"
       (interactive)
       (nconc org-agenda-files
-             (my--org-roam-list-notes-by-tag "Project")))
+             (my--org-roam-list-notes-by-tag "Project"))
+      (setq org-agenda-files (delete-dups org-agenda-files)))
     :config
     (require 'org-roam-dailies) ;; ensure the keymap is available
     (org-roam-db-autosync-mode)