How To Fix MC070 - Field & is part of a foreign key

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 070

• Message text: Field & is part of a foreign key

What causes this issue?

The selected field is redundant as part of a foreign key.
At least all the primary key fields which are not simultaneously
foreign key fields must be contained in certain types of views and in
matchcode objects. The foreign key fields are redundant since they have
the same values as the corresponding primary key fields.

System Response

The system gives a warning.

How to fix this error?

Remove the redundant field from the view or matchcode object.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC070 - Field & is part of a foreign key ?

  The SAP error message MC070, which states "Field & is part of a foreign key," typically occurs when there is an issue related to data integrity in the context of foreign key relationships in the database. This error can arise in various scenarios, particularly when dealing with master data or transactional data in SAP.
  Cause:
  
  
  Foreign Key Constraint Violation: The error indicates that the field in question is part of a foreign key relationship, and the value being entered or modified does not exist in the corresponding primary key table. This means that the system is trying to enforce referential integrity, and the data being processed does not meet the required conditions.
  
  
  Data Entry Issues: If a user is trying to enter a value that is not valid or does not exist in the related table, this error will be triggered.
  
  
  Configuration Issues: Sometimes, the configuration of the foreign key relationships in the database may not be set up correctly, leading to this error.
  
  
  Data Migration Issues: If data has been migrated from another system or if there have been changes in the data model, it may lead to inconsistencies that trigger this error.
  
  
  Solution:
  
  
  Check Data Validity: Verify that the value being entered in the field corresponds to a valid entry in the related table. Ensure that the foreign key value exists in the primary key table.
  
  
  Review Foreign Key Relationships: Check the configuration of the foreign key relationships in the database. Ensure that they are correctly defined and that the data model is consistent.
  
  
  Data Correction: If the data is incorrect, correct it in the relevant tables. This may involve adding missing entries to the primary key table or correcting the values in the foreign key field.
  
  
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or ABAP team to understand the specific foreign key relationships and constraints that are in place.
  
  
  Debugging: If you have access to debugging tools, you can trace the program or transaction that is causing the error to identify the exact point of failure.
  
  
  Data Migration Review: If the error occurred after a data migration, review the migration process to ensure that all necessary data was transferred correctly and that referential integrity was maintained.
  
  
  Related Information:
  
  Transaction Codes: You may want to check the transaction codes related to the specific module you are working with (e.g., MM for materials management, SD for sales and distribution).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional context.
  Data Dictionary: Use transaction SE11 to view the data dictionary and check the definitions of the tables and fields involved in the foreign key relationship.
  Testing: If possible, test the changes in a development or quality assurance environment before applying them to production.
  
  By following these steps, you should be able to identify the cause of the MC070 error and implement a solution to resolve it.