Ash 3.0 - Ash.update/1 fails to validate updated_at | Data layer does not support the function error

Ash 3.0 - Ash.update/1 is throwing an exception at updated_at column. How do I fix it? I tried several methods without success.

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%WithClauseError{term: {:not_atomic, "Failed to validate expression required!(now()): \"data layer does not support the function error(Ash.Error.Changes.Required, %{type: :attribute, resource: Kamaro.Stock.Category, field: :updated_at})\""}}

Here are my codes:

    def handle_event("validate", %{"form" => params}, socket) do
    form = AshPhoenix.Form.validate(socket.assigns.form, params)

    socket
    |> assign(:form, form)
    |> noreply()
  end

 def handle_event("save", %{"form" => params}, socket) do
    case AshPhoenix.Form.submit(socket.assigns.form, params: params) do
      {:ok, item} ->
        socket
        |> put_flash(:info, "Item saved!")
        |> push_navigate(to: ~p"/")
        |> noreply()

      {:error, form} ->
        assign(socket, form: form)
        |> noreply()
    end
  end