Purchase info record - Material vendor Number for different plant

Dear all,

A purchase info record has been created for 2 plants X & Y

In the Vendor Mt No field I want to have :

For plant X : TEXT1

For Plant Y : TEXT2

But when I want to put TEXT1 for Plant X , this info get directly to Plant Y

My question : Is it possible to have for the same PIR Number , one Vendor Mt No per plant ?

PS: The warehouse employee checks if the Mat number is identical to the one displayed via the MIGO (data coming from the Vendor Mat Number)

Thanks for your help

Regis