Multi issue with update

[almozavr]

Code Sample

  Multi.new()
    |> Multi.run(:userchat, fn _ ->
      userchat =
        Chat
        |> join(:inner, [c], uc in UserChat, uc.chat_id == c.id and uc.user_id == ^user_id)
        |> where([c], c.uid == ^chat_uid)
        |> select([c, uc], uc)
        |> Repo.one()

      Message
        |> where([m], (is_nil(^userchat.read_message_at)) and m.inserted_at < ^read_at_date)
        |> Repo.update_all(set: [status: :read])

      userchat
        |> Ecto.Changeset.change(read_message_at: read_at_date)
        |> Repo.update()

      {:ok, userchat}
    end)
    |> Repo.transaction()

Issue

Postgrex.Error) ERROR 42P18 (indeterminate_datatype): could not determine data type of parameter $2
             (ecto) lib/ecto/adapters/sql.ex:431: Ecto.Adapters.SQL.execute_and_cache/7
             (treel_chat) lib/app_chat/services/chat_service.ex:81: anonymous fn/2 in AppChat.ChatService.mark_as_read/3
             (ecto) lib/ecto/multi.ex:421: Ecto.Multi.apply_operation/5
             (elixir) lib/enum.ex:1899: Enum."-reduce/3-lists^foldl/2-0-"/3
             (ecto) lib/ecto/multi.ex:411: anonymous fn/5 in Ecto.Multi.apply_operations/5
             (ecto) lib/ecto/adapters/sql.ex:576: anonymous fn/3 in Ecto.Adapters.SQL.do_transaction/3
             (db_connection) lib/db_connection.ex:1283: DBConnection.transaction_run/4
             (db_connection) lib/db_connection.ex:1207: DBConnection.run_begin/3
             (db_connection) lib/db_connection.ex:798: DBConnection.transaction/3
             (ecto) lib/ecto/repo/queryable.ex:23: Ecto.Repo.Queryable.transaction/4

Same code without Multi works fine.

[almozavr]

Sorry, the issue is elsewhere but enum.