What do you suppose this means?
- Under "exclusive ownerships," all diaries must have at least one owner who does not own any other diaries.
I might be interpreting this incorrectly, but I believe if you have a shared diary, then you still own it. If you already own a diary, you cannot own another diary under what you have requested.
Again, I might not have got this right, so it's not official until another admin confirms that. But besides, if you already have a member forum, then why get another? Use what you already have