Natively, you can't. "Create issue" allows a user to create any type of issue in a project.
There are some tricks, including
- Javascript (clunky, hard to write, hard to maintain, and a doddle to get past)
- Injected javascript by add-ons, such as the Behaviours module in ScriptRunner. (Yes, I work for Adaptavist, but that's the only one I actually know of that does it. There may be others. You can still bypass it, but it's easier to handle)
- Don't stop them starting the creation, but block it when they click create after entering the data. This is usually done by making them fail a "validator", although in some cases you can do it by making a field mandatory for the issue type and then not letting those users have it on screen.
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