Goals - Priority Field List of values

Summary:

Hi Experts,

I would like to be able to edit the LOV for the field "HRG_PRIORITY" which is used in Goals as "Priority"

The admin for this field is found under:

Setup and Maintenance > Workforce Development > Worker Goal Settings > Worker Goal Setting Lookups

Name = HRG_PRIORITY

There are three values in the LOV: High, Medium and Low. I am not able to end date any of the values, and I am not able to disable any of the values.

Could you please advise how I go about doing this?

Note, I can add new values, and I can then edit/delete the values I have added myself. I just can't remove the High, Medium and Low values.