Diagnosis
A customer that has not been created in the system, or has already beenarchived, is assigned to the plant.

System Response
The plant data cannot be changed. If the customer has already beenarchived and deleted, changes to the address can lead toinconsistencies. The site data can only be displayed.

Procedure
Check whether the customer has been archived and deleted. If it hasbeen, you can retrieve the customer from the archive.
If you want to change the assignment, use theappropriate transaction.