Function state_events 

fn state_events<T, U>(room_id: &RoomId, state: &Raw<T>) -> Vec<U>
where
    U: DeserializeOwned + From<Owned<Pdu>>,

A sibling conduwuit-lineage server writes the leave event itself into this column rather than the array of state events written here, and a database imported from one keeps those rows as it wrote them. Both shapes are read, neither is rewritten, and the origin writes its own shape again on a swap back, so this column is not guaranteed to hold one format on disk.