In the implementation phase there is one task. The change manager set the change to complete status but forgot to set a task to 100% complete. When we now finish the review we want to close the change we get an error that we cannot close because there is still a task that is not 100% complete. We can no longer edit the task to show it is 100% complete. How can I fix this? I need to move the status back to implementation but I cannot see any option for this.