SAP Message /MAP/AD01066 - Same start date for plant &1 in row &2 and &3

Diagnosis
The location &V1&<(>&<)>V1<(>&<)> is already assigned with start dateV2 <(><)>v2<(><)>. this assignment is in line v3<(><)>v3<(><)>of the ALV list. As multiple assignment is not permitted, theassignments must not overlap.

System Response
The processed line is therefore incorrect.

Procedure
Remove the line from the ALV or adjust the time period of the assignmentto correspond with the entry in line &V3&<(>&<)>V3<(>&<)>.