How To Fix MK019 - Multiple main GTINs selected for material &1 and unit of measure &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MK - Mass Handling in the Material Master

• Message number: 019

• Message text: Multiple main GTINs selected for material &1 and unit of measure &2

What causes this issue?

Multiple GTINs were marked as the main GTIN for article &V1& and unit of
measure &V2&; this is not allowed.

System Response

The affected data records for article &V1& and unit of measure &V2& were
marked as having errors.

How to fix this error?

Adjust the <ZK>Main GTIN</> indicator so that exactly one GTIN is
classified as the main GTIN for each article and unit of measure.
You can correct the error in two ways:
By adjusting the data in your input file/in the clipboard
In the transaction, by correcting the <ZK>Main GTIN</> indicator in one
of the incorrect GTINs for this article and unit of measure.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MK019 - Multiple main GTINs selected for material &1 and unit of measure &2 ?

  The SAP error message MK019 indicates that multiple main GTINs (Global Trade Item Numbers) have been assigned to a material for a specific unit of measure. This situation typically arises when the system is unable to determine which GTIN to use for a given material and unit of measure combination, leading to ambiguity.
  Cause:
  
  Multiple GTINs Assigned: The material in question has more than one GTIN assigned for the same unit of measure.
  Configuration Issues: There may be issues in the configuration of the material master data, particularly in the GTIN assignment.
  Data Entry Errors: Incorrect or duplicate entries in the material master data can lead to this error.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) and check the GTIN assignments for the material.
  Ensure that there is only one main GTIN assigned for each unit of measure.
  
  
  
  Adjust GTIN Assignments:
  
  If multiple GTINs are found, determine which GTIN should be the main one for the specific unit of measure.
  Remove or deactivate the unnecessary GTINs to ensure that only one main GTIN is assigned.
  
  
  
  Review Unit of Measure Settings:
  
  Check the unit of measure settings for the material to ensure they are correctly configured.
  Make sure that the GTINs are correctly linked to the appropriate units of measure.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for guidance on managing GTINs and material master data.
  
  
  
  Testing:
  
  After making changes, test the material in the relevant transactions to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  GTIN: A GTIN is a unique identifier for trade items, which can be used globally. It is essential for inventory management, sales, and logistics.
  Material Master: The material master in SAP contains all the information related to a material, including its GTINs, units of measure, and other relevant data.
  Transaction Codes: Common transaction codes related to material management include MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  
  If the issue persists after following these steps, it may be necessary to consult with your SAP support team or a functional consultant who specializes in material management for further assistance.