Prevent Reviewers Adding Comments/Changing their decisions after project is completed

It would be nice if there was a way to break the proofing link after the project is completed. We had an instance where a reviewer went into Workfront added comments and change their decision after a project was completed. We are wondering if we could break the proofing link once the artwork is completed out, and if they want to make updates, they will have to create a new project. I know we can lock the proof, but to remember to do this each time would be a hassle.