SAP Message 0D081 - Account holder for acct/partner relationship is not defined (uniquely)

Diagnosis
Eachs contract account requires abusiness partner in the account holder relationship.However, this kind of relationship is not definedat all or ambiguously.

System Response
The program is terminated.

Procedure
INCLUDE NA_SYSADMIN1 OBJECT DOKU ID TX LANGUAGE EN

Procedure for System Administration
Create a unique account relationship with the accountholder characteristic.