Diagnosis
The values you entered for business partner, contract account and legalrelationship are not related to one another. It is possible that one ofthe values does not exist.
Partner,,= <(>&<)>V1<(>&<)>
Account,, ,,= <(>&<)>V2<(>&<)>
Contract,,= <(>&<)>V3<(>&<)>

Procedure
Modify your entries.