Copy a page with several diagrams using Diagramly(draw.io) plugin in Confluence, and edit the diagram for many times. Then I realise the edit are updated on both source and destination pages. There are some discussions about this issue (https://drawio.atlassian.net/browse/DFC-6 , DFC-1, DFC-12), but my problem is:
I need restore the diagram to old version, is it possible? I can restore the page, but there is no option to restore the old diagram.