Hi!
I have got a small problem with weapon racks. I want to have one similar to the one from WarehousePrefabs cell and put it in a cell in Skyrim's outer cell.
I am able to change sword to sth else, copy the rack with sword, and markers, but only in WarehousePrefabs. When i added it to exterior cell, it doesn't work,
the sword isn't attached to rack and falls to the ground. What should i do?

Leave the exterior cell, wait for 10 days (or however long the reset time is, I don't remember) somewhere, come back.

Or load your game without the mod active, go somewhere else, save and exit. Load your game with the mod, go back to the exterior cell.