PO getting in Pre-Approved status

Hi,

We have a PO which is going for approval and when the manager clicks on approve instead of getting approved it is getting into Pre-Approved status.

The user is getting the below notification,

Notification Email:

--------------------------

Failed to reserve funds for Standard Purchase Order XXXXX.

Reason(s) for Reserve failure:


Please note that your Standard Purchase Order would not be Approved unless funds have been reserved for it.

You can take one of the following actions:
1. Try to have Budgetary Controls updated so that Reservation succeeds in the next attempt.

2. Have your Standard Purchase Order forwarded to a person who has authority to override Reservations failure.