How To Fix WM484 - Material group & does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 484

• Message text: Material group & does not exist

What causes this issue?

You attempted to assign the material to an assortment module. It has
already been assigned to this assortment module for a specified period,
however.

System Response

You cannot assign the material to the assortment module twice.

How to fix this error?

Change the selection date on the initial screen. The system will then
display the material that you attempted to add to the module and the
period for which it is listed. You can now change the validity period.

Error message extract from SAP system. Copyright SAP SE.