Message SAP /MAP/AD01077 - For plant &1, processs the assignment in row &2 first

Diagnosis
You have entered plant &V1&<(>&<)>V1<(>&<)> manually in line &V2&
<(>&<)>V2<(>&<)>. However, an assignment exists for this that has notbeen maintained completely.

System Response
No new planned assignment can be created for plant &V1&<(>&<)>V1<(>&<)>until all the other planned assignments are complete.

Procedure
Process the assignment of the plant in line &V2&<(>&<)>V2<(>&<)>. If theassignment in this line is planned, maintain the validity period and theassortment to ensure the status of the assignment is yellow. If theassignment in this line has been released, determine the successor ofthis assignment in the same line, by manually maintaining the assortmentand the validity period, or by using assortment determination to find asuccessor.