I have not changed any properties of the Affects and Fixed Version/s built-in fields, however, when I try to edit them (either at Issue creation or during Issue update) these fields are pre-populated with "None" and are not editable. Has anyone experienced this before or can tell me if I need to set something somewhere?
Many thanks in advance, Emily Howell
Aside from the accepted answer, "Affected Version/s" and/or "Fixed Version/s" need to be present in the relevant Screen to be editable.
It's a bit confusing because if either field happens to have a value, both with be displayed in the issue view.
To further confuse things, when either field is not editable by a Project Admin (or lower) a JIRA System Administrator looking at the same issue will be able to edit the field.