How To Fix WTADDI208 - Supplier &1 is not a valid source of supply for additional &2

WTADDI208 - Overview

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 208

• Message text: Supplier &1 is not a valid source of supply for additional &2

What causes this issue?

You wish to assign vendor &V2& to additional &V1&, but this additional
cannot be procured from vendor &V2&.

System Response

INCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

You have the following options:
You generate a list of the vendors for the additional by displaying all
the info records, for example. You then select a vendor from this list.
You maintain the vendor you have just specified (&V2&) in the material
master data of additional &V1& (in the Purchasing view, for example).

Error message extract from SAP system. Copyright SAP SE.

WTADDI208 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WTADDI208: Supplier &1 is not a valid source of supply for additional &2
  
  Meaning / 
  Cause:
  This error occurs when you try to assign or use a supplier (&1) as a source of supply for an additional item or component (&2), but the system does not recognize this supplier as valid for that particular item.
  In other words, the supplier you are trying to add or assign is not maintained or allowed as a source of supply for the specified material or component in the system.
  
  Common Causes:
  
  
  Supplier not maintained in source list:
  The supplier is not listed in the source list for the material/component.
  
  
  Supplier not maintained in info record:
  The purchasing info record for the material and supplier combination does not exist or is incomplete.
  
  
  Material master data issues:
  The material or component does not have the supplier assigned as a valid source.
  
  
  Incorrect configuration or master