SAP Message AD290 - &-& (foreign key definition cannot be specified in full)

Diagnosis
It is not possible to create the foreign key definition, since all keyfields in the value table (primary key fields) would have to beassigned to foreign key fields (fields to be checked from the tableitself or possibly from another table). In this case, the assignmentwould be via the common domain of the field pairs.

System Response
The system attempted to create a default value for this assignment, butthe corresponding fields from the table to be checked could not beassigned to all the primary key fields.

Procedure
To be able to activate a relationship, the assignment of primary andforeign key fields must be complete. Any missing fields must be dealtwith manually afterwards in such a way that the fields to be checkedcan come not only from the table itself but also from another table. Ifan assignment is not possible, the data design of this table must bere-examined.