Yes, but it makes it "Not modifiable" on creation too. I mean, if i have in the customer master just one business partner, i can't modify it, if i have 2 or more, i can choose between them. The user want to use any business partner.
Now i'm talking to my users to suggest to use this, and i think it will be the most standart solution they can get. The only other solution will be use an user exit or something like that.
Thanks.