How To Fix CM_CFD_DE_MD_COMMON012 - Custom field name "&1" is not unique.

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_CFD_DE_MD_COMMON - DataSourceExtension: Message class for metadata down-/Upload

• Message number: 012

• Message text: Custom field name "&1" is not unique.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM_CFD_DE_MD_COMMON012 - Custom field name "&1" is not unique. ?

  The SAP error message CM_CFD_DE_MD_COMMON012 indicates that there is a problem with the uniqueness of a custom field name in the system. This error typically arises when you are trying to create or modify a custom field in the SAP system, and the name you have chosen for the field is already in use by another field.
  Cause:
  
  Duplicate Field Name: The most common cause of this error is that the custom field name you are trying to use is already assigned to another field in the same context (e.g., within the same table or structure).
  Namespace Conflicts: If you are working in a multi-client environment or with different namespaces, there may be conflicts with field names that are not immediately apparent.
  Incorrect Configuration: Sometimes, the configuration settings may not be correctly set up, leading to conflicts in field names.
  
  Solution:
  
  Check Existing Fields: Review the existing custom fields in the relevant context (e.g., the same table or structure) to see if the name you are trying to use is already taken. You can do this by navigating to the relevant configuration area in SAP.
  Rename the Field: If you find that the field name is already in use, choose a different, unique name for your custom field. Ensure that the new name adheres to any naming conventions your organization may have.
  Use a Prefix: To avoid future conflicts, consider using a specific prefix for your custom fields that is unique to your development or business area.
  Check for Transport Issues: If you are working in a development environment and transporting changes to a production environment, ensure that there are no transport issues that might be causing the conflict.
  Consult Documentation: Review SAP documentation or notes related to custom fields and their management to ensure you are following best practices.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on managing custom fields.
  Custom Field Management: Familiarize yourself with the Custom Fields and Logic app in SAP, which allows for the creation and management of custom fields in a more structured way.
  Naming Conventions: Establish and follow naming conventions for custom fields to minimize the risk of conflicts in the future.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.