How To Fix WM056 - Active assortment assignments still exist in target, delete beforehand

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 056

• Message text: Active assortment assignments still exist in target, delete beforehand

What causes this issue?

You attempted to copy a material assortment but the target assortment
was not completely empty.
There may still be listing conditions or assignments to modules
(possibly empty ones) defined for the assortment.

System Response

INCLUDE ISR_STOP

How to fix this error?

First, delete the existing material assortment.
Check whether a transaction to delete the assortment was started a
short time ago and is not yet fully posted - that can also cause this
system message.

Error message extract from SAP system. Copyright SAP SE.