How To Fix MC018 - Prohibido utilizar claves externas cíclicas.

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 018

• Message text: Prohibido utilizar claves externas cíclicas.

¿Qué causa este problema?

An aggregate (matchcode object, view, lock object) comprises several
tables which are connected with foreign keys. A primary table is
assumed to which further secondary tables can be added if they are
connected to the primary table with foreign key relationships. There
may be only one path with regard to the foreign key from the primary
table to each of the secondary tables.

Respuesta del sistema

El sistema emite un mensaje de error y no le permitirá continuar con esta transacción hasta que se resuelva el error.

¿Cómo arreglar este error?

Please check the foreign key relationships of the tables embraced by
the aggregate. If necessary, you must delete one of the secondary
tables or its foreign key so that the path from the
primary to the secondary tables is unambiguous.

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