Flagging NAVM of exterior cell as ignore, will revert back the whole navmesh cell and removes the new teleport door.
I got several issues cleaning my Silverfish Grotto with TES5Edit.
For istance I've a formlist with a list of custom NPC. One of the custom NPC was gone (the actorbase) and replaced with Katla (a vanilla NPC).
Another: A objectreference property of a scripted book item that was pointing to an xmarker, was replaced with a chair in the Thalmors' justiciars headquarters...
I edited nothing by hand with TES5Edit, just cleaning the ITMs.
I want to use TES5Edit as checking utility but I want to use CK to remove ITMs.