Update from 7.x-4.1 to 7.x-4.5 fails

An update from 7.x-4.1 to 7.x-4.5 fails with the following error message.

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '3-administer autologout' for key 'PRIMARY'

A look in the role table reveals the following entries:

The db_update looks like this:

/**
 * Fix permission names in role_permission table
 */
function autologout_update_7401() {
  db_update('role_permission')
    ->fields(array('permission' => 'administer autologout'))
    ->condition('permission', 'auto administer autologout', '=')
    ->execute();
}

there are no other corresponding updates to this table in the install file.

Those are our featured permissions:

// Exported permission: 'administer autologout'.
  $permissions['administer autologout'] = array(
    'name' => 'administer autologout',
    'roles' => array(
      'administrator' => 'administrator',
      'testrole' => 'testrole',
    ),
    'module' => 'autologout',
  );