Since the Drupal 6 version of the module stores data in a separate table and the Drupal 7 version uses Field API there needs to be an upgrade path from the Drupal 6 version to the Drupal 7 version.
Note this issue is for the Drupal 7 version of the module and I will switch the version once a D7 one is available.
Comments
Comment #1
clemens.tolboom