Symptoms
After system copy, the nodes of the origin system have still appeared in the target system.
Reason and prerequisites
This is standard behavior during 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 the table /DVD/APPD_NODE.
Select the node, click on Table Entry and Delete.
Even the system copy will be done again, the same steps should be repeated.