How To Fix EN477 - &3 must be unique for &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: EN - IS-U installation/installation structure

• Message number: 477

• Message text: &3 must be unique for &1 &2

What causes this issue?

You have attempted to create or change a register in the &V1& &V2&
category. However, the &V3& of &V4& must either be empty or match the
&V3& of the other registers.
INCLUDE ISU_WEITEREINFOS OBJECT DOKU ID TX
<DS:TX.ISU_DMDIIS_CONDITION_REGREL>Restrictions on processing register
relationships</>.

System Response

Entries cannot be processed.

How to fix this error?

Enter the correct operation code.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EN477 - &3 must be unique for &1 &2 ?

  The SAP error message EN477 typically indicates that there is a uniqueness constraint violation in the system. This error occurs when you are trying to create or modify an entry in a table where a certain field (or combination of fields) must be unique, but the value you are trying to enter already exists in the database.
  Cause:
  The error message EN477 &3 must be unique for &1 &2 can be broken down as follows:
  
  &1: This usually represents the object type (e.g., a specific table or entity).
  &2: This represents the specific field or fields that are involved.
  &3: This indicates the value that is causing the conflict.
  
  The cause of this error is typically due to:
  
  Attempting to insert a duplicate value in a field that is defined to be unique.
  A misunderstanding of the data model, where the user may not be aware of existing entries that conflict with the new entry.
  Data integrity issues, where the data may have been incorrectly entered or not cleaned up properly.
  
  Solution:
  To resolve the EN477 error, you can take the following steps:
  
  
  Check Existing Data: Look up the existing entries in the relevant table to see if the value you are trying to enter already exists. You can use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to view the data.
  
  
  Modify the Entry: If the value already exists, you will need to either:
  
  Change the value you are trying to enter to something unique.
  Update the existing entry if that is appropriate.
  
  
  
  Review Constraints: Understand the uniqueness constraints defined in the data model. This may involve reviewing the table structure and any associated documentation.
  
  
  Data Cleanup: If there are duplicate entries that should not exist, consider cleaning up the data to remove or consolidate duplicates.
  
  
  Consult Documentation: If you are unsure about the uniqueness constraints, consult the SAP documentation or your organization's data governance policies.
  
  
  Seek Help: If you are unable to resolve the issue, consider reaching out to your SAP support team or a knowledgeable colleague for assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), and SE78 (SAP Archive Link) to help you investigate the issue.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message.
  Data Model: Understanding the data model and relationships between tables can help prevent similar issues in the future.
  
  By following these steps, you should be able to identify the cause of the EN477 error and take appropriate action to resolve it.