issue with Name of SC in SC header in SRM 7

HI ,

I am not able to find the solution for the below object.

If you observe the above screen, here my requirment is " While creating SC as per standard functionality if i change any BUY on Behalf of value automatically it was changing Name of shopping cart.

As per my requirment i need restrict to display name of shopping cart description while changing any user in Buy on Behalf of field.

Regards,

Sri