You can control who has the ability to edit issues per project, but you cannot restrict individual fields or issue types from being edited.
If you don't want to restrict all edits, you can control who can edit that field using the workflow:
Please read the official "field level security" feature request for some other options:
Atlassian released a security advisory on 3/20/2019. The full advisory is here: https://confluence.atlassian.com/doc/confluence-security-advisory-2019-03-20-966660264.html In a nutshe...
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