I am using the managed_file in a form to upload a file to Drupal. As you know Drupal saves the name of this file into its database and stores it in the path you give.
Unfortunately, when a user uploads a file which has the filename of a previously existing file, he receives an AJAX error that arises from SQL. Even though Drupal manages to store this file with a different name in the folder, I can't prevent the AJAX error.
Is there a solution for this?