CRFCN0228E The target node can not be a child of the source node.
Explanation
When you drag an object within an object map, the object is
moved within the hierarchy that it is currently part of. Movement of an object
to a lower level within its hierarchy is not permitted.
System action
The current operation is aborted.
User response
Do not move the object to a lower level within the hierarchy
that it is already part of.