"Risk consequence" and "Risk probability" fields are locked
Atlassian's REST API allows the plugin to add Select List (single choice) type of fields on installation only when they are locked, which means you can't:
change their name and description
edit their possible values
remove them
change their Context
You can:
change the Risk field mapping in the configuration of the App (to use another field)
create a custom field that better meets your needs and use it for field mapping
associate the Locked fields with various screens to use them in your projects