Make sure that the object is not currently in use anywhere and that the "Is Knowledgeable" is not set. I've seen it before where if the "Is Knowledgeable" is set to true, you cannot delete it.
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Make sure that the object is not currently in use anywhere and that the "Is Knowledgeable" is not set. I've seen it before where if the "Is Knowledgeable" is set to true, you cannot delete it.