How To Fix MC067 - Foreign key & after & is not a key extension

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 067

• Message text: Foreign key & after & is not a key extension

What causes this issue?

For performance reasons, synchronous maintenance of matchcodes from the
database interface of the SAP System is subject to certain
restrictions which the system checks when update type 'S' is selected
for a matchcode ID. For example, a matchcode ID that is to be
maintained synchronously may contain only tables that are
<LS>hierarchically</> dependent on one another. Table A is hierarchally
dependent on table B if the key of A forms a prefix to the key of B,
that is, fields are simply added to the key of the referenced table in
the dependent table (it is also possible for both tables to have the
same key).
<LS>Example</>:

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

The key of table A consists of the fields K1 and K2. In this case,
table B, which is dependent on table A, can only be included in the
matchcode ID if the key of B starts with K1 and K2.

System Response

The system checks the restrictions described here and issues an
appropriate error message.

How to fix this error?

Include only those matchcode object tables in the matchcode ID which
do not violate the restrictions or check your relationship definitions.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC067 - Foreign key & after & is not a key extension ?

  The SAP error message MC067, which states "Foreign key & after & is not a key extension," typically occurs in the context of Material Master data or when dealing with the configuration of foreign key relationships in SAP. This error indicates that there is an issue with the foreign key relationship defined in the system, specifically that the foreign key you are trying to use is not recognized as a valid key extension.
  
  Cause:
  
  Incorrect Foreign Key Definition: The foreign key you are trying to reference may not be defined correctly in the system.
  Missing Key Extension: The key extension that you are trying to use may not exist or is not properly configured in the system.
  Data Inconsistency: There may be inconsistencies in the data that prevent the foreign key from being recognized.
  
  Configuration Issues: The configuration settings for the relevant tables or fields may not be set up correctly.
  
  
  Solution:
  
  
  Check Foreign Key Configuration:
  
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