I have edited "Schedule Issue" permission in the permission scheme for a project, defining the Schedule Permission for a narrower user group. But it doesn't seem to work, i.e. other users still have that permission.
I wanted to change permissions for certain users, so those users cannot add issues to a current sprint. for which I have read that "Schedule issue" permission is relevant.
I have checked, there is no override from users belonging to eg. default (Jira-defined) admin group, or any other group with overriding permissions.