Currency in requisition

Hello

we have the issue that eg on the supplier the currency is EUR

we create a req in USD , or gbp, then autocreate is used to create a PO,

--> i would assume that the currency is taken over from the requisition,

but on one system we are testing on, it takes EUR

and on another system it takes gbp, or Usd   (systems have different patch levels)

my question is, what is the normal behaviour

i would assume that if req in usd or gpb, than this is the same on the po (created via autocreate)

or is there somewhere a setting which controls this ?