How To Fix LB165 - Proportion unit or product unit & may not be changed

LB165 - Overview

• Message type: E = Error

• Message class: LB - Logistics: Batch - Management

• Message number: 165

• Message text: Proportion unit or product unit & may not be changed

What causes this issue?

You want to assign a new reference unit of measure to the proportion
unit or product unit &V1&.
The change to the reference unit of measure is not allowed because
unit of measure &V1& is being used to define <DS:DE.MSEHI_WS>units of
measurement</>;
unit of measure &V1& is being used in one or more materials

System Response

Your current entries are reset.

How to fix this error?

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.

LB165 - Details

• The SAP error message LB165, which states "Proportion unit or product unit & may not be changed," typically occurs in the context of handling materials, especially when dealing with batch management or when trying to change the unit of measure for a material that is already defined in a certain way.
  
  Cause:
  
  Unit of Measure Configuration: The error often arises when there is an attempt to change the unit of measure for a material that is already in use in a specific context (e.g., in a batch, in stock, or in a transaction).
  Batch Management: If the material is batch-managed, certain attributes related to the batch may restrict changes to the unit of measure.
  Material Master Data: The material master data may have restrictions or settings that prevent changes to the unit of measure.
  Proportion Units: If the material is linked to a proportion unit (used in production or planning), changing the product unit may