How To Fix WM221 - You are assigning mats. to assortment & - they are not defined there

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 221

• Message text: You are assigning mats. to assortment & - they are not defined there

What causes this issue?

You are listing a material in an assortment although the material group
of this material is not defined in the material group assortment
master. This could result in an illogical assortment (such as deep
frozen goods in a plant without the necessary equipment, for example).

System Response

You are only given the chance to respond to this error if you activate
the "Display / Process listing errors" flag. If you do not, the
incorrect plants will simply be excluded from the listing.

How to fix this error?

Reset the selection flag for the assortment (then no listing will
occur) or ignore this error (and a listing will then take place).
However, you should only do this if the consequences of this action are
completely clear to you.

Error message extract from SAP system. Copyright SAP SE.