Cant hide/select model line after script run?

Relatively new to Dynamo, and wanting to renumber all doors in a project I am working on. I came across the script at the website below;

The script works well renumbering the doors, but the model line in Revit cannot be selected once the script has ran (to hide it). The line does show up if a sheet with it on is printed. (also the model line turns from green to blue)

How can I hide the model line or work around it ?

Hi @anthardacre,

The blue line is temporary. It will disappear once dynamo or Revit is closed.

See this post to disable the preview :

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