System is restricting to one workflow per document revision. There is no need for this and it actually causes issues with user processes.
Therefore the system must not error when documents are on other reviews in progress.
However:
The system must warn on document association which document revisions have other reviews running as well as listing those reviews and their names.
This same validation and warning must occur when user goes to set a return code on the document.
Also when notification close out emails are sent at the end the warning must occur