Deleting or editing completed development goals

Summary

As a HR specialist, why can i not edit or delete competed development goals

Content

I have employees ask me if they can edit their development goals once they have completed as they have not meant to complete it or they need to update something.  They cannot do this, but neither can I?  

 

In performance, I can edit a completed goal - is this expected behaviour or is there a bug?

 

Thanks

Version

20B