Fusion Lease Property registration three-level parent-child hierarchy error

Summary:

Fusion Lease Property registration throws an error when attempting to register a three-level parent-child hierarchy

Content (please ensure you mask any confidential information):

When attempting to import Properties with a three-level hierarchy as shown in the image below, Parent1 and Parent2 were imported successfully without any issues. However, an error occurs when trying to import the Child value.
The error message is:"You must provide a parent property of the level ****."

Question 1:
Is it unsupported by design/specification to register a three-level parent-child hierarchy for Properties?

Question 2:
If there is a way to resolve this error, could you please advise on how to handle it?