How To Fix EL400 - Entry number &1 is not unique

EL400 - Overview

• Message type: E = Error

• Message class: EL - IS-U meter reading data processing

• Message number: 400

• Message text: Entry number &1 is not unique

What causes this issue?

As a result, you can no longer enter the specified selection criteria.

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?

Please contact SAP.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

EL400 - Details

• The SAP error message EL400 "Entry number &1 is not unique" typically occurs in the context of managing entries in a table or database where a unique identifier is expected. This error indicates that the system has encountered a situation where it expects a unique entry (like a key or identifier) but has found multiple entries that match the criteria.
  
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there are duplicate entries in the database or table for the specified key or identifier.
  Data Integrity Issues: There may be issues with data integrity, where the system's constraints on unique entries are violated.
  Incorrect Configuration: Sometimes, the configuration of the system or the way data is being entered can lead to duplicates being created unintentionally.
  Custom Development: If there are custom programs or enhancements, they might not be handling unique constraints properly.
  
  
  Solution:
  
  Identify Duplicates: Use SQL queries or SAP transaction codes (like SE16