Accounting hub - how to update the manage sources

Hi,

It is observed after completing the configurations, "Flexfield Segment Name" selection were not saved. It is showing as "Other" which is a default values. Ideally it should have saved with the selection of respective segment qualifiers like balancing, Nominal and Cost Centre etc.

Now the UI is greyed out and unable to modify the values. I have tired FSM export and import from other instance where these were selected but didn`t work. Please let me know if there is a way to update these sources?