Is it able to edit UOM of PR line during autocreate?

Dear All,

I have one problem:

- Is it able to edit / update UOM of PR line during autocreate?

Detail Scenario:

a - create PR with one-time item with UOM,save and approve

b - attempt to autocreate PR to PO, on form 'POXBWVRP.fmx', attempt to change UOM to a new value, but find this columns shows as grey which NOT able to be edited or updated.

Is this standard function designed? or it is controlled by some setup?

Any response would be appreciated, look forward to your response.

Regards,

Joy