Country of origin in t-code ME31L needs to be mandatory

Hi Gurus,

We need to make the " Country of origin" field to be required field in transaction ME31L/ME32L in the below path.

Schedule Agreement (ME31L) --> Item --> More Functions --> Foreign Trade / Customs.

Looks like it is related to part of SD. Could you please suggest me how to make this field as required while create /change the scheduling agreement.

Regards,

Sada