Customize tree view UD form

Hello community,

There is a custom form for UD06 table used for some scheduling process in my company. It shows a mainPanel with 2 tabs and an epiTreeview panel with some other controls. In E10, I can go into developer mode and add fields to that treeView panel with no restriction. (image1- schedulerE10.png)

After converting our DB from E10 to Kinetic, all the fields in the TreeView panel are gone and I’m not able to add new fields … (image2 - scheduler11.png)

I’ve tried adding fields into the detailPane, but when I try to name them the way fields should be, I get the error saying a field named that way already exist so I choose another name, then cut the field and paste it into the treeview panel, object is shown there, but after saving and restarting the custom, object is gone…

please help…