Documentation for "Edit Issue Security Levels States:

'Edit Issue Security Levels
On this page you can create and edit the issue security levels for the "StandardTaskSecurityScheme" issue security scheme. '

Expected Behaviour: To be able to create and edit the issue security levels
Observed Behaviour: You can Add, and Delete, but not edit

Suggested Action: One of
o Changing documentation to note that you can create and delete issue security levels
o Changing the behaviour so you can Create and Edit the issue security levels.