Follow-up/replacement material & is not listed for assortment &

What causes this issue?

No valid listing condition exists for the follow-up/replacement material
and assortment of the new or changed follow-up/replacement material
relationships.

System Response

You defined list field <LS>Check for Listing Conditions</> in
Customizing for the follow-up type of a follow-up/replacement material
relationship to determine whether the system performs a check for the
listing conditions when a follow-up/replacement material relationship is
created or changed and whether a warning message or an error message is
displayed if the listing condition is missing.
This check is only performed if the assortment category of the
follow-up/replacement material relationship is a store assortment
category. In this case, the system checks whether a valid listing
condition exists for the follow-up/replacement material and the
assortment.
If the <LS>Validity</> flag is <ZH>set</> in the follow-up type, the
system checks whether a valid listing condition exists for the
follow-up/replacement material, the store assortment category, and the
validity period of the follow-up/replacement material.
If the <LS>Validity</> flag is <ZH>not set</>, the system checks whether
a valid listing condition exists for the follow-up/replacement a listing
period into account.

How to fix this error?

If the system displays a warning message, you do not have to do
anything. The system saves the relationship.
If the system displays an error message, you have to change teh
follow-up/replacement material and/or the assortment and/or the validity
period such that the listing check finds a valid listing condition for
the follow-up/replacement material and the store assortment category.
Alternatively, you can create a valid listing condition for the
follow-up/replacement material and the store assortment category.

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.