Symptoms
After a system copy, nodes of a source system still appeared on a target system.
Reason and prerequisites
This is a standard behavior during a system copy
Solution
Generally, it is not recommended to delete tiers or nodes.
If, however, the nodes have to be deleted, it can be done via SE16 in table /DVD/APPD_NODE.
Select the node, click on Table Entry and Delete.
If the system copy is done again, the same steps should be repeated.