Business area field Mandatory in MIGO

Hi

We have a requirement where we need to make business area field (GSBER) mandatory when user does GR or Goods issue. We have configured values for this field so that user can select them.

Please help me how can i make this field mandatory.  I could not fing GR for Movement type 101 s othat i cn make Business area mandatory. I tried doing it for Goods issue 201 but the field didnt display.

Any help will be appriciated and awarded

Pradeep