I am on jira 5.0.2. While trying to create a new project with key XYZ13 the system is nt allowing me to do so with an error message.
You must specify a unique project key, at least 2 characters long, containing only uppercase letters.
I checked for this key XYZ13 and it does not appear in any of my projects.
What can be going wrong?
Note: I do have a project with key XYZ in my instance.
There was a bit of a change here. Atlassian have never supported numeric keys but did allow us to change it. But in later versions, the key pattern moved from a config file into the admin screens, and, of course, that clobbers upgrades. Because you lose that setting - it reverts to [A-Z][A-Z]+
This doesn't affect existing projects, only creation of a new project. You can, of course, simply update the pattern to allow it. I would strongly recommend [A-Z][A-Z1-9]+ though - I ran into a bug in two different plugins where they choked on project keys starting with numbers (but worked fine with numbers after the initial letter)
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