Tricky. I have something that sort of does this:
It's not fool-proof, as you can't be certain that the issue link is Duplicate, and it requires a custom transition. It's better than nothing though, and I don't know any other out-of-the-box solution for that.
The Scriptrunner plugin would allow you to script your own validator.
This approach requires you to have the JIRA administrative rights. The main aim of this article is to help you achieve an organized, easy-to-maintain workflows in your JIRA instance thereby, reducin...
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