Idoc failing with error : Fill all required fields SAPMF02K 0120 LFA1-BEGRU

Hello,

Few idocs are being sent from ABC(source system) to XYZ(target system), we are getting error message "Fill all required fields SAPMF02K 0120 LFA1-BEGRU"

In target system XYZ the field BEGRU on the vendor screen has been disabled and is not mandatory, what should be done in order to prevent this idoc from failing and getting this error message.

Regards,

Ankit