Could not process entry '&2' for property tree '&1'

What causes this issue?

The system attempted to link the individual nodes within a property
tree. During this operation, it detected an error.

System Response

The corresponding nodes are not displayed in the property tree.

How to fix this error?

Notify your system administrator.


Note for the system administrator
Check the assignment of fields ID and PARENT in table TCG53.

Error message extract from SAP system. Copyright SAP SE.