How To Fix TU029 - Combination &1 exists several times

SAP Error Message - Details

• Message type: E = Error

• Message class: TU - Billing/Scheduling/Budget Billing

• Message number: 029

• Message text: Combination &1 exists several times

What causes this issue?

The combination of billing class/division category &V1& that you have
entered occurs more than once. Each combination must only occur once.

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?

Enter each combination of billing class/division category once only.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TU029 - Combination &1 exists several times ?

  The SAP error message TU029, which states "Combination &1 exists several times," typically occurs in the context of configuration or master data where a specific combination of characteristics or values is expected to be unique but is found to have multiple entries in the system.
  Cause:
  
  
  Duplicate Entries: The most common cause of this error is that there are duplicate entries in the database for the combination of characteristics or values you are trying to create or modify. This can happen in various contexts, such as material master data, configuration profiles, or variant configuration.
  
  
  Incorrect Configuration: If you are working with configurable materials, the configuration settings may not be set up correctly, leading to multiple entries for the same combination.
  
  
  Data Migration Issues: If data has been migrated from another system or if there have been bulk uploads, it is possible that duplicates were introduced during this process.
  
  
  Solution:
  
  
  Check for Duplicates: Use transaction codes like SE16 or SE11 to check the relevant database tables for duplicates. Identify the entries that are causing the conflict.
  
  
  Delete or Merge Duplicates: Once you have identified the duplicates, you can either delete the unnecessary entries or merge them if applicable. Ensure that you have backups and that you understand the implications of deleting data.
  
  
  Review Configuration Settings: If the error is related to configurable materials, review the configuration settings to ensure that they are set up correctly and that there are no conflicting entries.
  
  
  Data Validation: Implement data validation checks to prevent duplicates from being created in the future. This can include setting up unique constraints in the database or implementing checks in the application logic.
  
  
  Consult Documentation: Refer to SAP documentation or support notes related to the specific module you are working with for additional guidance on resolving this error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE16 (Data Browser), SE11 (Data Dictionary), and others that may help you analyze the data.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  User 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 TU029 error and implement a solution to resolve it.