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

IU035 - Overview

• 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.

IU035 - Details

• 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