Error when trying to update overall quiz form settings

I get the same error here. It isn't thrown on a clean D 7.17.1 installation, but nevertheless persists when deactivating almost all modules on an existing D7.17 installation. Anyone any idea?

I confirm this is happening if tried to save default settings as user other than uid 1.

This is fixed now.

I am still getting the same error using 7.x-4.0-beta1.

It seems to be a conflict between trying to use merge_db when the $user->uid and $node->save_def_uid differ (quiz.module line 4188).

Reproduce steps;

- Install quiz, quiz_question, multichoice
- Save the settings as any user (I used uid 1) at /admin/quiz/settings/quiz_form
- Create a new user
- Save the settings form again at /admin/quiz/settings/quiz_form

(
    [%type] => PDOException
    [!message] => SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1' for key 'PRIMARY': INSERT INTO {quiz_user_settings} (uid, nid, vid, aid, pass_rate, summary_pass, summary_pass_format, summary_default, summary_default_format, randomization, backwards_navigation, keep_results, repeat_until_correct, feedback_time, display_feedback, takes, show_attempt_stats, time_limit, quiz_always, has_userpoints, allow_skipping, allow_resume, allow_jumping, show_passed) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11, :db_insert_placeholder_12, :db_insert_placeholder_13, :db_insert_placeholder_14, :db_insert_placeholder_15, :db_insert_placeholder_16, :db_insert_placeholder_17, :db_insert_placeholder_18, :db_insert_placeholder_19, :db_insert_placeholder_20, :db_insert_placeholder_21, :db_insert_placeholder_22, :db_insert_placeholder_23); Array
(
    [:db_insert_placeholder_0] => 1
    [:db_insert_placeholder_1] => 0
    [:db_insert_placeholder_2] => 0
    [:db_insert_placeholder_3] => 
    [:db_insert_placeholder_4] => 100
    [:db_insert_placeholder_5] => 
    [:db_insert_placeholder_6] => filtered_html
    [:db_insert_placeholder_7] => 
    [:db_insert_placeholder_8] => filtered_html
    [:db_insert_placeholder_9] => 0
    [:db_insert_placeholder_10] => 1
    [:db_insert_placeholder_11] => 2
    [:db_insert_placeholder_12] => 0
    [:db_insert_placeholder_13] => 0
    [:db_insert_placeholder_14] => 0
    [:db_insert_placeholder_15] => 0
    [:db_insert_placeholder_16] => 0
    [:db_insert_placeholder_17] => 0
    [:db_insert_placeholder_18] => 1
    [:db_insert_placeholder_19] => 0
    [:db_insert_placeholder_20] => 1
    [:db_insert_placeholder_21] => 1
    [:db_insert_placeholder_22] => 0
    [:db_insert_placeholder_23] => 1
)

As an update I added my own submit handler for this as follows as a temporary measure:

/**
 * Implements hook_form_alter().
 *
 * Get the info about the referenced article and add it to the form.
 */
function my_module_form_alter(&$form, &$form_state, $form_id) {
  // Alter the submit handler for the quiz form to prevent errors when 
  // Different users save quiz settings.
  // altering the default settings.
  if ($form_id == 'quiz_admin_node_form') {
    $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Save'),
    '#submit' => array('_my_module_quiz_admin_node_form_submit'),
    );
  }
}

/**
 * overrides quiz_admin_node_form_validate() from quiz.admin.inc
 */
function _my_module_quiz_admin_node_form_submit($form, &$form_state) {
  // We add the uid for the "default user"
  global $user;
  $form_state['values']['save_def_uid'] = $user->uid;
  $form_state['values']['nid'] = 0;
  $form_state['values']['vid'] = 0;
  $form_state['values']['aid'] = '';
  _quiz_save_user_settings($form_state['values']);
}