How To Fix WE302 - Not possible to select the "Alphanumeric EANs" field here

WE302 - Overview

• Message type: E = Error

• Message class: WE - Messages for EAN Customizing and for EAN management in MM_BD

• Message number: 302

• Message text: Not possible to select the "Alphanumeric EANs" field here

What causes this issue?

You have specified a check algorithm, but you have selected the field
for alphanumeric EANs. If a check digit algorithm is predefined, the
EAN category may contain numeric EANs only. You are not, therefore,
allowed to select the field for alphanumeric EANs.

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?

Error message extract from SAP system. Copyright SAP SE.

WE302 - Details

• Certainly! Here's a detailed explanation regarding the SAP error message WE302: "Not possible to select the 'Alphanumeric EANs' field here":
  
  Error Message:
  WE302 - Not possible to select the "Alphanumeric EANs" field here
  
  
  Cause:
  This error occurs when you try to select or activate the "Alphanumeric EANs" field in the Partner Profile (WE20) or in the EDI message processing settings, but the system does not allow it in the current context.
  EAN (European Article Number) fields are used for product identification in EDI messages. The "Alphanumeric EANs" option allows the use of alphanumeric characters in EAN fields instead of only numeric values.
  The main reasons for this error are:
  
  
  Incorrect Message Type or Segment Context:
  The "Alphanumeric EANs" field is only valid for certain message types or segments. If you try to activate it in a message type or segment where it is not supported, the system throws this error.
  
  
  Incorrect Configuration in Partner Profiles or IDoc segments:
  The field