I have a cloned project. Most of the project is shared to other projects (i.e. workflow, issue types).
Is there a way that I can unlink certain areas or change it without effecting the other projects?
EDIT: Addition to question
You can't really "unlink" them, the issue types are single shared objects, not links.
What you can do:
JIRA will ask you to map the old issue types on to new ones and then change them all for you
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