xClassification: Manual Re-Structuring/Editing

Question

Hello Everyone,I am currently struggling with xClassification and I need some help/insight.My current client created an xClassification structure, xClass and xProperties, sometime ago from and Engineering context.As a corporate goal they are now challenged to create an Enterprise xClass and xProperties structure that will be used to publish, from PLM, to a Convergence system, Oracle EBS, and Oracle Fusion using an Enterprise classification structure.So My current challenge is to updated the current xClass-xProperty structure to the the hierarchy while&nbsp; preserving all the current/existing xProperty data.Thus far I have been able to:1) Rename all xClass items required2) Generate the [From_RefId - To_Refid] string that establishes the&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xClass Hierarchy xClassificationTree.classification_hierarchy3) Align xClass_xPropertyDefinition with xClass_xProperty_Flatten with&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;xClass.xproperties_sort_orderThe ClassificationTree loads as shown belowBut when I try to save the xClassification tree I get this error:I found the Error String in {Aras.Server.Core.dll}. internal class XTreeMigrationModel but, I'm not sure what it is actually doing to throw the exception. Below is the code snippet that throws the exception.&nbsp;&nbsp;