SAP Message WXP233 - Source planning step &1 is not defined in planning scenario &2

Diagnosis
You want to define planning step &V1& as the source of a link. However,this planning step has not yet been created for planning scenario &V2&.

System Response
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Procedure
Enter planning step &V1& in maintenance for planning scenario &V2& .The planning step can be used as a source planning step in a link.