Here is the article on how to make a valid backup of your Proseries client files:
https://accountants-community.intuit.com/articles/1606223-how-to-copy-or-backup-client-files-using-p...
Once they are backed up I recommend doing a restore and you can find that article below.
https://accountants-community.intuit.com/articles/1606637-restoring-client-data-files-using-proserie...
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