Please see the graphic on the bottom of this page in our documentation — you should be able to click on the ellipses of the diagram macro on your page and then select "unlink diagram": https://help.gliffy.com/confluence/Content/GliffyConfluence/Inserting-existing-diagram.htm
If that doesn't work, you could trying inserting a new diagram, selecting "Search for a Template" and using the existing diagram as a template for the new diagram. Make sure the "link to original diagram" box is unchecked.
Please let me know if neither of those work!
Hi Samie, thanks for your response. The second option works (inserting a new diagram and deleting the one originally copied as part of the page copy), but I'd consider that to be a workaround. Re the preferred first option, why do I get the message "Diagram with this name exists in page" or even "There was an error on the server while unlinking the diagram" when I press "Unlink Diagram"?
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