USE provisioning;

DELETE FROM voip_preferences WHERE attribute = 'music_on_hold';

ALTER TABLE voip_subscribers 
  DROP COLUMN pbx_hunt_policy,
  DROP COLUMN pbx_hunt_timeout,
  DROP COLUMN pbx_extension,
  DROP COLUMN profile_set_id,
  DROP COLUMN profile_id;

DROP TABLE voip_subscriber_profile_attributes;
DROP TABLE voip_subscriber_profiles;
DROP TABLE voip_subscriber_profile_sets;