How To Fix CNV_DMC_SIN529 - Changing of value &1 in field &2 is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 529

• Message text: Changing of value &1 in field &2 is not allowed

What causes this issue?

You transferred the value &V1& in field &V2& provided on sheet/staging
table &V3& which has already an existing value &V4& in the related
product master.

System Response

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

How to fix this error?

It is not allowed to change already existing values in the related
product master: Therefor you can use the Mass Maintenance App. For
further information, refer to online documentation of the Mass
Maintenance App.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_SIN529 - Changing of value &1 in field &2 is not allowed ?

  The SAP error message CNV_DMC_SIN529, which states "Changing of value &1 in field &2 is not allowed," typically occurs during data migration or transformation processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is an attempt to change a value in a field that is not permitted due to business rules, data integrity constraints, or system settings.
  Cause:
  
  Data Integrity Constraints: The field you are trying to change may have restrictions based on the business logic or data model. For example, certain fields may be read-only or may only be modified under specific conditions.
  Configuration Settings: The system may have been configured to prevent changes to certain fields to maintain data consistency.
  Migration Rules: During data migration, specific rules may be in place that restrict changes to certain fields to ensure that the migrated data adheres to the target system's requirements.
  Field Status Group: The field may be part of a field status group that restricts its modification based on the transaction or context.
  
  Solution:
  
  Review Business Rules: Check the business rules and data model to understand why the field is restricted. Ensure that the change you are trying to make is valid within the context of your business processes.
  Check Configuration: Review the configuration settings in the SAP system to see if there are any restrictions on the field. This may involve checking field status groups or other related settings.
  Modify Migration Logic: If you are using a migration tool, review the migration logic to ensure that it complies with the restrictions of the target system. You may need to adjust the mapping or transformation rules.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional guidance and best practices.
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration and the error message.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Data Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit, which may provide insights into common issues and best practices.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.