xcode – How you can set a number of specs for iOS turbomodule?

I take a reference from official doc, it is working.
https://reactnative.dev/docs/turbo-native-modules-introduction?platforms=ios

However when I attempt to set a number of specs for iOS, I get the error

10 duplicate symbols
Linker command failed with exit code 1 (use -v to see invocation)

Here’s what I attempt:

step 1 npx @react-native-community/cli@newest init FirstApp

"react-native": "0.77.0",

step 2 add codegen setting in bundle.json

  "codegenConfig": {
    "libraries": [
      {
        "name": "NativeLocalStorageSpec",
        "type": "modules",
        "jsSrcsDir": "specs",
        "android": {
          "javaPackageName": "com.nativelocalstorage"
        }
      },
      {
        "name": "NativeBluetoothSpec",
        "type": "modules",
        "jsSrcsDir": "specs",
        "android": {
          "javaPackageName": "com.nativebluetooth"
        }
      }
    ]
  },

step 3 add file underneath specs folder (RN root challenge)

specs/NativeBluetooth.ts

import sort { TurboModule } from 'react-native';
import { TurboModuleRegistry } from 'react-native';

export interface Spec extends TurboModule {
  enableBluetooth(): void;
}

export default TurboModuleRegistry.getEnforcing('NativeBluetooth');

specs/NativeLocalStorage.ts

import sort {TurboModule} from 'react-native';
import {TurboModuleRegistry} from 'react-native';

export interface Spec extends TurboModule  null;
  removeItem(key: string): void;
  clear(): void;


export default TurboModuleRegistry.getEnforcing('NativeLocalStorage');

step 4 sort terminal command

cd ios

bundle set up

bundle exec pod set up

after which open XCode construct the challenge get the error:

10 duplicate symbols

Linker command failed with exit code 1 (use -v to see invocation)

What’s the downside ?