Its not going to be possible to do this in JIRA Cloud.
With JIRA Server, you can leverage the Script Runner add-on: https://marketplace.atlassian.com/plugins/com.onresolve.jira.groovy.groovyrunner
For more details, please reference this previously posted questions - they aren't identical but are similar in nature:
In the past, Portfolio for Jira required a high degree of detail–foresight that was unrealistic for many businesses to have–in order to produce a reliable long-term roadmap. We're tur...
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