As I create a new validation, I am able to associate a Change Action along with the Validated Objects. 

This Change Action is seen as Validated Object under the Review created.

Under the Relations Explorer I can see the association established.

My customer asked, if user forgets to associate this Change Action during creation, how can it be associated later? I could not find any way to make this association later. Can anyone please help me understand? Is this gap in YED or there is a way to achieve this function?