Change currency in dbm order

Hi Automotives

i have a request about the currency in dbm order here is the deal:

my customer has this config:

as you can see the currecy is USD, but i also need to sell in other currency (PEN), in the dbm order:

i am trying to change the currency but is not allow me

Is there any way to manage 2 currency in dbm order? any suggest will be appreciated.

thanks.

note: i configured ob08 with exchange rate (USD and PEN)

thanks