How To Fix LB507 - The already-defined altern. UoM &2 is to be assigned to characteristic &1

LB507 - Overview

• Message type: E = Error

• Message class: LB - Logistics: Batch - Management

• Message number: 507

• Message text: The already-defined altern. UoM &2 is to be assigned to characteristic &1

What causes this issue?

You wish to assign the unit of measure &V2& to characteristic &V1&. This
unit of measure has already been defined as an alternative unit.
You are using WM to pick deliveries. Open deliveries that have not yet
been picked or confirmed exist. These deliveries/shipments cannot be
processed further after conversion into a product unit of measure.

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 confirm all picking-relevant shipments for this material.
To determine the open deliveries, please start the transaction
<DS:TRAN.VL06P>Outbound Deliveries for Picking (VL06P)</> and restrict
selection to 'WM Picking Only' and the material &V3& (all selection
criteria).
To determine the shipments still to be confirmed, please start the
transaction <DS:TRAN.VL06C>List of Outbound Deliveries to be Confirmed
(VL06C)</> and restrict selection to the material &V3& (all selection
criteria).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LB507 - The already-defined altern. UoM &2 is to be assigned to characteristic &1 ?

  The SAP error message LB507 indicates that there is an issue with the assignment of an alternative unit of measure (UoM) to a characteristic in the context of handling units or material management. Specifically, it suggests that the alternative unit of measure you are trying to assign to a characteristic is already defined elsewhere, which is causing a conflict.
  
  Cause:
  
  Duplicate Assignment: The alternative unit of measure (UoM) you are trying to assign to the characteristic is already assigned to another characteristic or material.
  
  Configuration Issues: There may be configuration settings in the material master or handling unit management that are not aligned with the intended use of the alternative UoM.
  Data Integrity Issues: There could be inconsistencies in the data that lead to this error, such as incorrect entries in the master data.
  
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Go to the relevant transaction (e.g., MM03 for material master) and check the existing assignments of the alternative