EBS R11i. New Subinventories and Default Cost Group

Creating new subinventories to be the same as an existing one which has default cost group = CG-3104

Problem  - new subinventory defaults the default cost group as CG-1683 and it cannot be changed

I believe this comes from the Inventory Org Set up ?   And I can see no Org set up that has the default_cost_group as CG-3104

select * from cst_cost_group_accounts

where cost_group_id IN (3104, 1683)

both org 2887     Which is Spain EST

select * from cst_cost_groups

where cost_group_id IN  (select a.cost_group_id from cst_cost_group_accounts a

where a.cost_group_id IN (3104, 1683))