I have many projects and issu types and if all projects admins start edit own workflow this is big problems.
How to disable this options permanently from JIRA ?
It's not possible to disable it (although the request has already been raised)
To put a mostly-acceptable block on it though, simply make sure all your workflows are used by more than one project (even if it's an inactive or hidden project). As soon as a workflow is shared, project admins can't change it.
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