PO Approval Error -No Approver found

We are using  R12.1.3

We are having  existing PO approvals  position based hierarchy .

Comprising  GM as the final approver

PO approval path :

1. GM_PO_Approval_Division1
2. GM_PO_Approval_Division2

For both above  approval path below are members.

1. GM
2. CFO
3. Purchase Dept Manager
4. Purchase officer

Now management  want to amend for

     GM_PO_Approval_Division1 -  For All PO  amount <=50,000  will be approved by CFO and above  50,000  only will go to GM approval.

But  for GM_PO_Approval_Division2 - No Change - All values -1 to any value - GM will be the final approver.

To handle this We  created to new PO approval hierarchy : CFO_PO_Apprl_50000