The format of the issue key is so fundamentally baked into JIRA, that if you changed this somehow, it would break a plethora of things.
Why don't you use a textual custom field for your own key, and force the format using a regex? (There are apps in the Atlassian Marketplace that offer this custom field type.)
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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