The Repo.insert_all(SCHEMA, MAP(S), OPTS) pattern has been my go to without any issue until now. Any assistance disambiguating the error message below is greatly appreciated

defmodule FastCarsDB.Vehicles do
    use Ecto.Schema
    import Ecto.Changeset

    schema "vehicles" do
        field :make, :string, null: false
        field :color, :string, null: false
        field :mileage, :float, null: false

        timestamps(type: :utc_datetime)
    end

    def changeset(vehicles, params \\ %{}) do
        vehicles
        |> Ecto.Changeset.cast(params, [:make, :color, :mileage])
        |> validate_required([:make, :color, :mileage])
    end

end

defmodule Foo do
    alias FastCarsDB.{Repo, Vehicles}

    def update_db do
        record =
        %{
            color: "Red", 
            make: "Mclaren", 
            mileage: 15641.469, 
            inserted_at: DateTime.truncate(DateTime.utc_now, :second), 
            updated_at: DateTime.truncate(DateTime.utc_now, :second)
        }

        Repo.insert_all(Vehicles, record, on_conflict: :nothing)
    end
end

Error Message:

iex(1)> Foo.update_db
** (FunctionClauseError) no function clause matching in Ecto.Repo.Schema.do_insert_all/6    

The following arguments were given to Ecto.Repo.Schema.do_insert_all/6:

# 1
FastCarsDB.Repo

# 2
FastCarsDB.Vehicles

# 3
nil

# 4
"vehicles"

# 5
%{
    color: "Red", 
    make: "Mclaren", 
    mileage: 15641.469, 
    inserted_at: ~U[2020-06-28 22:41:23Z], 
    updated_at: ~U[2020-06-28 22:41:23Z]
}

# 6
[on_conflict: :nothing]

Attempted function clauses (showing 2 out of 2):

defp do_insert_all(_name, _schema, _prefix, _source, [], opts)
defp do_insert_all(name, schema, prefix, source, rows, opts) when is_list(rows)

(ecto 3.4.5) lib/ecto/repo/schema.ex:26: Ecto.Repo.Schema.do_insert_all/6
(elixir 1.10.3) lib/enum.ex:1396: Enum."-map/2-lists^map/1-0-"/2
(elixir 1.10.3) lib/enum.ex:1396: Enum."-map/2-lists^map/1-0-"/2