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

EN477 - Overview

• 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.

EN477 - Details

• 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