How To Fix AD284 - &-&: la clave externa no puede ser especificada completamente

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 284

• Message text: &-&: la clave externa no puede ser especificada completamente

¿Qué causa este problema?

It is not fully possible to define of the foreign key. When defining
the foreign key, a foreign key field must be assigned to each primary
key field of the check table or a field must explicitly be assigned a
constant or excluded from the check.
The assignment in the check field uses the common domains of the pair
of fields. The ABAP Dictionary data type and the length must be
consistent for all other pairs of fields.

Respuesta del sistema

The system automatically attempted to make a suggestion for this
assignment. However, the corresponding fields of the table to be
checked could not be assigned to all the primary key fields.

¿Cómo arreglar este error?

In order to activate a table with foreign keys, the assignment of check
fields and foreign key fields must be complete. The missing field
assignments must be maintained manually, whereby the fields to be
checked can come from a foreign table as well as from the table itself.
Constants can also be used for the missing field assignments or the
field can be removed explicitly from the assignment to the key fields
of the check table (generic foreign key). In this case the check is
only made against the remaining fields.

Extracto de mensaje de error del sistema SAP. Copyright SAP SE.