Diagnosis
You want to create a material-routing assignment, however, thematerial- routing assignment already exists. The valid-from date forthe material- routing assignment is later than the key date youentered.

System Response
The validity of the material-routing assignment is not extended.

Procedure
If you want to extend the validity of your material-routing assignment,proceed as follows:
Enter a key date (or a change number with a key date) that is withinthe validity period of the existing material-routing assignment.
Delete the existing material-routing assignment.
Enter the key date from which you want the material-routing assignmentto be valid.
Create the material-routing assignment with this key date.