How To Fix CNS205 - Foreign key table &2 using fields &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNS -

• Message number: 205

• Message text: Foreign key table &2 using fields &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNS205 - Foreign key table &2 using fields &1 ?

  The SAP error message CNS205 typically indicates an issue related to foreign key constraints in the database. This error occurs when there is an attempt to insert or update a record in a table that references another table through a foreign key, but the referenced record does not exist.
  Cause:
  The error message CNS205 is triggered when:
  
  You are trying to insert or update a record in a table (let's call it Table A) that has a foreign key relationship with another table (Table B).
  The value you are trying to insert or update in Table A does not match any existing value in the primary key of Table B.
  
  Solution:
  To resolve the CNS205 error, you can take the following steps:
  
  
  Check Foreign Key Relationship:
  
  Identify the foreign key relationship between the two tables. You can do this by checking the data dictionary (transaction SE11) for the table definitions.
  
  
  
  Verify Data Integrity:
  
  Ensure that the value you are trying to insert or update in Table A exists in Table B. You can run a SELECT query on Table B to confirm that the corresponding record exists.
  
  
  
  Insert Missing Record:
  
  If the record in Table B does not exist, you will need to insert it before you can successfully insert or update the record in Table A.
  
  
  
  Correct the Data:
  
  If the value you are trying to insert is incorrect, correct it to match an existing value in Table B.
  
  
  
  Check for Cascading Deletes:
  
  If records in Table B were deleted, and you are trying to reference them in Table A, you may need to handle cascading deletes or ensure that the data is consistent.
  
  
  
  Review Application Logic:
  
  If this error occurs frequently, review the application logic to ensure that it correctly handles the creation and updating of records in both tables.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), or SE80 (Object Navigator) to investigate the tables and their relationships.
  Foreign Key Constraints: Understanding how foreign key constraints work in your database can help prevent this error in the future.
  Debugging: If you are developing or customizing an application, consider using the debugger to trace the execution and identify where the incorrect value is being set.
  
  By following these steps, you should be able to resolve the CNS205 error and ensure that your data integrity is maintained.