Likely a preparation for O3, to bee consistent. Not that he’ll drop T8 abilities, but still.
Also, again, this is most likely due to the “type” for the item originally being something else - like how sometimes Deca re-uses types used for…say, a stack of 8 hearts, for something new. Really obscure items may therefore lead to being replaced by wholly new items, given that they aren’t wiped entirely first.