How To Fix IU035 - Table &: Changes for key fields are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 035

• Message text: Table &: Changes for key fields are not allowed

What causes this issue?

The table cannot be locked for the incremental table conversion because
a key was shortened due to a field deletion. Because database triggers
are used and because data records are identified using the primary key,
the current procedure is not compatible with field deletions in the key.

System Response

The table is not included in the list for incremental conversion.

How to fix this error?

Convert the table with the standard conversion program (database utility
SE14). This is done automatically during the upgrade.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IU035 - Table &: Changes for key fields are not allowed ?

  The SAP error message IU035, which states "Table &: Changes for key fields are not allowed," typically occurs when there is an attempt to modify a key field in a database table that is not permitted. Key fields are essential for uniquely identifying records in a table, and changes to these fields can lead to data integrity issues.
  Cause:
  
  Modification of Key Fields: The most common cause of this error is an attempt to change a key field in a table. Key fields are defined in the data dictionary and are not meant to be altered once they are set.
  Incorrect Logic in ABAP Code: If you are using ABAP code to update records, there may be logic that inadvertently tries to change a key field.
  Data Consistency Rules: SAP enforces data consistency rules, and changing key fields can violate these rules.
  
  Solution:
  
  Review the Code: If you are using custom ABAP code, review it to ensure that you are not trying to modify key fields. Instead, consider creating a new record if a change is necessary.
  Use Proper Update Methods: If you need to change non-key fields, ensure that your update statements only target those fields. For example, use the UPDATE statement correctly to avoid key field modifications.
  Check Table Configuration: If you are working with a custom table, check the table configuration in the Data Dictionary (SE11) to confirm which fields are defined as key fields.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific table you are working with to understand its structure and constraints.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to view the structure of the table and identify key fields.
  Debugging: If you are unsure where the error is occurring, you can use the ABAP debugger to step through the code and identify the exact point of failure.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to the specific table or error message.
  Data Integrity: Always ensure that any changes made to the database maintain data integrity and adhere to SAP's best practices.
  
  By following these steps, you should be able to resolve the IU035 error and understand the constraints related to key fields in SAP tables.