When moving issue to new project, the issue key changes. Where can I see the previous issue key? Can I add a field to map it to?
You can find issue key changes in the History while opening the Activity section like on the screen below.
If you need to get a report for the list of issues or filter issues by sprint, assignee, project, dates, etc., check out Issue History for Jira app. It is developed by my team as a customizable journal for every past activity.
Also, here is the case from one of our users that can be helpful How many tickets were moved from one Jira project to another? [Use case]
Let me know if those solutions help in your case.
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