How To Fix MC713 - &-& is not a semantic foreign key

MC713 - Overview

• Message type: E = Error

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

• Message number: 713

• Message text: &-& is not a semantic foreign key

What causes this issue?

You can only link two tables to a view using semantic foreign keys.
These are foreign keys whose type and cardinality is known.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter the missing definitions for the foreign key of the specified
table and activate the table.

Error message extract from SAP system. Copyright SAP SE.

MC713 - Details

• The SAP error message MC713 indicates that there is an issue with a foreign key relationship in the context of a data model or a database table. Specifically, the message states that a certain field (represented by & in the error message) is not recognized as a semantic foreign key. This typically occurs in the context of data extraction or reporting, particularly when working with InfoObjects in SAP BW (Business Warehouse) or similar data modeling scenarios.
  
  Cause:
  
  Incorrect Foreign Key Definition: The field in question may not be defined correctly as a foreign key in the data model. This could be due to a missing or incorrect relationship between the tables or InfoObjects.
  Data Type Mismatch: The data types of the fields involved in the foreign key relationship may not match, leading to the inability to establish a valid foreign key.
  Missing Data: The data that is supposed to establish the foreign key relationship