You will have to restore an old (automatic generated or not) import of your instance. You can do it using JIRA's .xml file or a database backup file. I believe these are the only ways to restore data lost and both need the backup file of when the information was in your instance. I hope you have one of these!
The .xml file of JIRA should be located in JIRA_Home/export/
The Jira Marketing team is putting together an ebook on migrating to Data Center. We're looking for pro tips on how you staffed your project team and organized your Proof of Concept. Share yo...
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