Business process steps &1 and &2 cannot be associated

What causes this issue?

You have change the quantity of an item in business process step &V3&.
Due to this change, an association between business process steps &V1&
and &V2& must be created.

System Response

No entry exists in Customizing for association management to enable the
creation of an association between business process steps &V1& and &V2&
.
Processing was cancelled.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.