Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting Changing Root Template of Interactable fails

I'm trying to make a working portcullis for a castle/keep.

1. Placed down a BLD_HOE_Platform_Rising_4m_A_Door (or a BLD_HOE_Wall_Shifting_4m_A).
2. Replaced items Root Template with BLD_Humans_Prison_Grating_I
3. Made sure all properties match original interactable item (platform or wall)
4. Click on new grating interactable -- no effect.

Log also shows following error after clicking on either new item or original platform/wall item:

Script: Constant in script for unknown object is invalid, item with handle 'e63f9ee3-59dd-40db-9118-973924ab2bad' doesn't exist
Timestamp: 30-09-2017 18:38:34:175
Function: esv::ScriptParam::GetItem
Location: EoCServer\Server\ScriptParam.cpp (737)

No suggestions? Is it not possible to change Root Template of an animated object??