I am unable to create vendor for loan it says vendor V06 is not linked to any customer why is that?

Hello SAP Gurus I request assistance  

I americium incapable to make slope arsenic a vendor for involvement complaint instrumentality to creat indebtedness contract, It says Vendor V06 is not linked to immoderate lawsuit wherefore is that? however to lick this and delight constituent maine to the close direction..

Thankyou.