SAP Message UPB120 - Characteristic &4 (&3) is not restricted to a single value

Diagnosis
The account characteristic &v2& (&v1&) is compounded with thecharacteristic &v4& (&v3&).
To execute the function, it is necessary that all characteristics
subordinate to the account characteristic are restricted to a single
value at the time of execution.

System Response
The planning function could not be executed.

Procedure
Restrict the characteristic &v4& (&v3&) in the selections of theplanning level to a single characteristic value.