How To Fix MK020 - Value '&1' not permitted for main GTIN ind. with material &2 and UoM &3

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 020

• Message text: Value '&1' not permitted for main GTIN ind. with material &2 and UoM &3

What causes this issue?

The character '&V1&' was imported as the flag for the main GTIN, for
article &V2& and unit of measure &V3&.

System Response

This value is not permitted.

How to fix this error?

Replace the incorrect value with an <LB>X</> in the data file or the
clipboard data, if the affected GTIN should be the main GTIN for this
article and unit of measure. Otherwise, leave the field empty.
Alternatively, you can also correct the incorrect value here by setting
the indicator for the main GTIN in the GTIN that has this error, or in
one of the alternative 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 MK020 - Value '&1' not permitted for main GTIN ind. with material &2 and UoM &3 ?

  The SAP error message MK020 indicates that there is an issue with the Global Trade Item Number (GTIN) for a specific material and unit of measure (UoM). The error message typically arises when the value assigned to the main GTIN indicator is not permitted or valid for the specified material and UoM combination.
  Cause:
  
  Invalid GTIN Value: The GTIN value provided may not be valid or may not conform to the expected format.
  Incorrect Configuration: The main GTIN indicator may not be properly configured in the material master data.
  Missing Data: The material master may be missing required data related to GTIN or UoM.
  Inconsistent Data: There may be inconsistencies between the GTIN and the material or UoM settings in the system.
  
  Solution:
  
  Check GTIN Value: Verify that the GTIN value entered is correct and follows the required format (e.g., length, numeric characters).
  Review Material Master Data: Go to the material master record (transaction code MM03) and check the GTIN settings under the relevant views (e.g., Basic Data, Sales, or Purchasing).
  Update Main GTIN Indicator: Ensure that the main GTIN indicator is set correctly for the material. You may need to update the material master data to reflect the correct GTIN.
  Check UoM Settings: Ensure that the unit of measure (UoM) associated with the material is correctly defined and compatible with the GTIN.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on GTIN configuration and requirements.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: MM03 (Display Material), MM02 (Change Material), and MM01 (Create Material) can be used to manage material master data.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on GTIN handling.
  Configuration Settings: Review the configuration settings in SPRO related to material management and GTIN handling to ensure they are set up correctly.
  
  By following these steps, you should be able to identify and resolve the MK020 error in SAP.