How To Fix LB804 - Batch number already exists

LB804 - Overview

• Message type: E = Error

• Message class: LB - Logistics: Batch - Management

• Message number: 804

• Message text: Batch number already exists

What causes this issue?

The batch number that would be created as a result of the production
order number or process order number used already exists. This may be
the case when two or more batches are created for a production order or
process order.

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?

In external (manual) assignment, choose another number.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

LB804 - Details

• The SAP error message LB804, which states "Batch number already exists," typically occurs when you are trying to create or assign a batch number in the system that is already in use or has been previously created. This error is common in inventory management and batch management scenarios within SAP.
  
  Cause:
  
  Duplicate Batch Number: The batch number you are trying to create or use already exists in the system for the same material.
  Batch Management Settings: The material may be set up for batch management, and the system is enforcing unique batch numbers.
  Incorrect Data Entry: There may be a typographical error in the batch number you are trying to enter.
  Batch Number Scope: The batch number might be restricted to a specific plant or storage location, and you are trying to use it in a different context.
  
  
  Solution:
  
  Check Existing Batches: Use transaction codes like MSC3N (Display Batch) or MMBE (Stock Overview) to check if the