How To Fix W_DSD_01023 - This matl/store comb. already has a main suppl. assignment in the future

W_DSD_01023 - Overview

• Message type: E = Error

• Message class: W_DSD_01 - Global message class for DSD

• Message number: 023

• Message text: This matl/store comb. already has a main suppl. assignment in the future

What causes this issue?

You have selected a main vendor for a material/store combination which
already has a main vendor assignment for another vendor in the future.

System Response

You cannot select this vendor as main vendor, since there must be only
one main vendor for each material/store combination at a specific time.

How to fix this error?

If you want to mark this vendor as main vendor for the material/store
combination, you must first remove the future main vendor assignment for
the other vendor.

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 W_DSD_01023 - This matl/store comb. already has a main suppl. assignment in the future ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W_DSD_01023: This matl/store comb. already has a main suppl. assignment in the future
  
  Meaning / 
  Cause:
  This warning message occurs in SAP when you try to assign a main supplier to a material/store combination (material + plant or storage location) for a future validity period, but there is already an existing main supplier assignment for the same material/store combination that overlaps or exists in the future.
  In other words, the system prevents you from having two different main suppliers assigned to the same material and store combination for overlapping or future time periods. The "main supplier" is the primary vendor responsible for supplying the material to that plant or storage location.
  
  When does it occur?
  
  When maintaining source list entries (transaction ME01 or via material master purchasing view).
  When creating or changing info records or source lists with future validity dates.
  When assigning a main supplier