Delete Electronic Signatures in baselines.

As Rational Doors allows all the reviewers of a document to sign it with any of the roles permitted (author, reviewer or approver) it is very usual that any of them mistake the role and it is not possible to modify it. It seems either that is not possible to restrict a user to take one specific role.

This is what I'm trying to find a way to remove this signature allowing the person to sign again with the correct role but I cannot discover how to do it. Any help will be appreciated.
Krogen - Wed Nov 09 06:55:06 EST 2011