error at react redux combinereducer with typescript

I'm trying to learn redux by making a to-do list

but i am getting an error and i couldn't solve this problem

my types

  export interface TodoType {
  text: string;
  id: number;
}
export interface TodoState {
  todoList: TodoType[];
}

interface ADD_TODO {
  type: "ADD_TODO";
  payload: TodoType;
}
interface REMOVE_TODO {
  type: "REMOVE_TODO";
  payload: TodoType;
}
export interface AppState {
  todo: TodoState;
}
export type TodoAction = ADD_TODO | REMOVE_TODO;

TodoReducer.ts ;

import { TodoState, TodoAction } from "global";

const INITIAL_STATE: TodoState = {
  todoList: [],
};

export const TodoReducer = (state = INITIAL_STATE, action: TodoAction) => {
  console.log(state, action);
};

index.ts

import { TodoState } from "global";
import { combineReducers } from "redux";
import { TodoReducer } from "./reducers/TodoReducer";

export interface AppState {
  todo: TodoState;
}

const rootReducer = combineReducers<AppState>({
  todo: TodoReducer,
});
export default rootReducer;

here I am getting error in todo: part

index.ts of my file

import ReactDOM from "react-dom";
import { Provider } from "react-redux";
import { applyMiddleware, createStore } from "redux";
import thunk from "redux-thunk";

import App from "./App";
import rootReducer from "./store";

const store = createStore(rootReducer, applyMiddleware(thunk));

ReactDOM.render(
  <Provider store={store}>
    <App />
  </Provider>,

  document.getElementById("root")
);

I will be very glad if you can help me how to solve this problem

Your TodoReducer should return TodoState types at all times.

Currently, you are only logging state and action inside your reducer. Fill it up and it should work fine.