How budgets to be handled for internal requisition

Hello All,

I have the below scenario, kindly advise how to handle it effectively.

Common items are procured and stored in a central warehouse. For this a requisition is created in the main operating unit(OU1), encumbered , PO is auto created from requisition , item received and delivered in the inventory.

Other OUs such as OU1 and OU2 needs that items so internal requisition is created , encumbered , approved.

In this scenario a budget is reserved for the same item by OU1 and OU2 that belongs to the same legal entity and ledger.

The question here is how budget can be reserved for the item purchase by two different OUs under the same group company, is it the right process, if not what is the best practice.