Mannequin Duplication glitch

In this thread, user Malac'ra wrote down the following pure gameplay solution based on this video:

1. Take all duplicated armor off of mannequin.
   Leave the area and come back (I went in and out of the cellar for this).
2. Add a full set of unique enchanted armor (Thieves Guild, Nightingale, Shrouded Armor, etc.) and shield (such as Targe of the Blooded), leaving the duplicated armor in the mannequin's inventory. Enchanted gear should appear on the mannequin over top of the duplicated gear.
   Leave the area and come back.
3. The old duplicated gear should be on top again. Take everything out of the mannequin's inventory. Without leaving the mannequin inventory screen, add all the duplicated stuff and then all the enchanted armor IN THAT ORDER. The enchanted gear should be visible on the mannequin before leaving.
   Leave the area and come back.
4. The enchanted gear should still be on top. Take everything out of the mannequin's inventory. Go in and out of the inventory several times for good measure, then leave the area and go back.
5. Mannequin should now be naked and have nothing in the inventory.
   Supposedly it's done duplicating armor now.

(Here's a variation on the theme. The mannequins seemingly need to be conditioned properly.)

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For pc gamers (and completeness' sake), in that same long and winding thread about this bug, another user offers the following solution using the game's console:

• Enter the house so that the mannequin is wearing the items it keeps duplicating;
• go into the console and click on the mannequin;
• type inv, type removeitem followed by the the equipped item's baseID [space] followed by 1 (e.g. removeitem 13965 1), and hit Enter (same steps for each of the items). This should permanently remove them from the mannequin.
• Drop the items you want on the floor and get their baseID;
• go back to the mannequin;
• type equipitem, followed by the baseID of the item on the floor (enchanted custom armor should have their own baseID) [space] 1 and hit Enter. That should permanently equip the item on the mannequin. Then I dropped all the dozens of duplicated items on the floor, clicked on them while in the console, typed markfordelete, and hit Enter. I did that for all the items individually. Then I saved the game and restarted.

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Some notes:

• Based on comments, this bug seems to be exclusive to the Hearthfire houses.
• The bug is fixed by the Unofficial Patch (Xbox 1/PC), although the fix sometimes gets overridden by other mods, depending on the load order.
• There is a standalone mod for the PC addressing this bug, called 'Skyrim Mannequin Duping Bug Fix'. It can be found here. The mod offers an update of the bugged vanilla mannequin script (MannequinActivatorSCRIPT.pex).