I added an existing user to a forum using the 'Add' function at the bottom of the General Settings section within the Edit Forum page.  Then I granted this user various permissions such as View Forum and Post Replies.

Sometime later, I deleted this user entirely from the portal using the User Accounts page under DNNs Admin menu.

Now, there is still a row of permissions checkboxes showing for this deleted user in the General Settings section within the Edit Forum page.  There is no name appearing to the left of the checkboxes, and they are checked or unchecked in the same way they were before the user was deleted.

How can I clear this "phantom" row of permissions?

I browsed all of the Forum_* tables in the DB and found only one with records that appeared to be causing this.  It's the Forum_ForumPermission table and it had a handful of records with UserID = -1.  I deleted all those records but the row of checkboxes still appears.

Can anyone help?  Also, is there a way to remove a user from the permissions area in the General Settings tab, regardless of whether you plan to delete the user from the entire portal?

Thanks.