Calling kill - but already IsDestroyed!?

Not sure if this is your mod but this keeps happening...

10/18 04:56:47 AM | You've successfully pasted the structure
10/18 04:58:18 AM | LoadPrefab - should start with assets/ -
10/18 04:58:18 AM | NullReferenceException: Object reference not set to an instance of an object
10/18 04:58:18 AM | Calling kill - but already IsDestroyed!? crate_tools
10/18 04:58:18 AM | Calling kill - but already IsDestroyed!? loot_barrel_2
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?
10/18 04:58:27 AM | Calling kill - but already IsDestroyed!?'
... x infinity

And ideas?  Perhaps some dead item class names in the base files being loaded & removed from the map?

hi, I get this without any plugin loaded so I am not sure

I notices that if I reload the Buried Treasure mod this notification goes away.