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

SAP Error Message - Details

• 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.