How To Fix 29661 - Reference usage and new usage are the same

SAP Error Message - Details

• Message type: E = Error

• Message class: 29 - Bills of Material

• Message number: 661

• Message text: Reference usage and new usage are the same

What causes this issue?

You want to define copy defaults for an item status when creating a new
usage from a reference usage.
You have entered the same value in the <LS>Reference BOM usage</> and
<LS>New BOM usage</> fields.

How to fix this error?

Please correct your entry in at least one of these fields.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 29661 - Reference usage and new usage are the same ?

  The SAP error message 29661, "Reference usage and new usage are the same," typically occurs in the context of SAP's data migration or data transfer processes, particularly when dealing with the migration of master data or transactional data. This error indicates that the system has detected that the reference usage (the existing usage of a data object) and the new usage (the intended new usage for that data object) are identical, which is not allowed in the context of the operation being performed.
  Cause:
  
  Duplicate Usage: The error often arises when you are trying to change the usage of a data object (like a material, vendor, or customer) to a new usage that is the same as its current usage.
  Incorrect Data Mapping: During data migration or data upload, the mapping of the reference data to the new data may have been incorrectly set up, leading to the same usage being assigned.
  Configuration Issues: There may be configuration settings in the system that do not allow for the intended changes if the new usage is the same as the existing one.
  
  Solution:
  
  Check Current Usage: Verify the current usage of the data object in question. You can do this by checking the relevant master data records in the SAP system.
  Modify the New Usage: If the new usage is indeed intended to be different, ensure that the new usage is correctly defined and does not match the existing usage.
  Data Mapping Review: If this error occurs during a data migration process, review the data mapping to ensure that the new usage is being set correctly and does not duplicate the existing usage.
  Consult Documentation: Refer to SAP documentation or notes related to the specific transaction or process you are working with to understand any constraints or requirements regarding usage changes.
  Testing: If you are working in a development or test environment, try to replicate the issue with different data to see if the problem persists. This can help identify if the issue is data-specific or a broader configuration issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context on how to handle it.
  Transaction Codes: Familiarize yourself with the transaction codes related to the data you are working with (e.g., MM01 for material master, XK01 for vendor master) to better understand how usage is defined and modified.
  Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.