How To Fix COM_PRODUCT_CUSTMSG001 - GTIN &1 (&2) has already been assigned

COM_PRODUCT_CUSTMSG001 - Overview

• Message type: E = Error

• Message class: COM_PRODUCT_CUSTMSG - Product: Customer-Specific Messages

• Message number: 001

• Message text: GTIN &1 (&2) has already been assigned

What causes this issue?

The GTIN you used has already been assigned to another combination of
product and unit of measure. The GTIN, however, must be unique at this
level.

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?

Enter another GTIN for this unit of measure.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

COM_PRODUCT_CUSTMSG001 - Details

• The SAP error message COM_PRODUCT_CUSTMSG001 indicates that a Global Trade Item Number (GTIN) has already been assigned to a product in the system. This error typically occurs when you attempt to create or assign a GTIN that is already in use for another product or has been previously assigned to the same product.
  
  Cause:
  
  Duplicate GTIN Assignment: The GTIN you are trying to assign is already linked to another product or has been previously assigned to the same product.
  Data Entry Error: There may be a mistake in the GTIN you are entering, leading to an attempt to assign a GTIN that already exists.
  System Configuration: The system may have constraints or settings that prevent the reassignment of GTINs once they are assigned.
  
  
  Solution:
  
  Check Existing Assignments: Verify if the GTIN is already assigned to another product. You can do this by searching for the GTIN in the relevant SAP transaction (e.g., using transaction codes like