How to change the currency for a buy planned order in supply Planning?

Summary:

Need to understand if it is possible to change the currency for a Buy Planned Order generated by Supply Planning and how the currency is determined for the planned supply.

Content (please ensure you mask any confidential information):

We are reviewing Buy Planned Orders generated from Supply Planning and need to confirm how the currency is derived and whether it can be changed manually after the planned order is created.

Current observations:

• Currency seems to default based on Items attributes.
• We need to confirm if currency can be updated directly on the planned order or only via setup changes.