the separate location is still within lucidcharts

Hi Lisa 

Thanks for posting in the Lucid Community! When you duplicate a page tab or a document it creates a copy that is not attached to the original source. Unfortunately there is no way to have changes made on the duplicate to also update the original document. Something that you may find helpful is to utilize the publishing feature: published documents are fully interactive so you can add links to external sites or pages that viewers can click on. This would allow you to continue to edit your document and embed a link to it in other documents that could direct back to your original document. 

I hope this helps! Please let me know if you have any additional questions.