Problem about adding tags

hello, I am trying to create tags but there is parent data type which is I never add in custom section. you can see in pictures. How can delete it? and I want to add opc item path but I can not add it, Why? please help me.
(I am using Windows 10 pro and ignition 8.1.32)

Right-click on the UDT (in the Tag Browser), select Copy JSON and paste the JSON in here. Select the JSON and click the </> button to format it as code and preserve indents.

You should be able to add and delete properties with these buttons: