How to hot update bundle project

Cocos Creator
#1

Hi,
I have a game with multi bundle inside(game A), a start scene(Main) loading every thing and show the hall, then sub game will be download. Everything works perfectly, now i want hot update form another game(game B) to game A but has troubles.
It cannot hot update because game A build with md5 option. So i create another project(game C) with a simple scene to load scene from game A, and build with no md5. Then i hot update game C from game B and it works.

@ccclass
export default class GameC extends cc.Component {
    onLoad(): void {
        let url = 'https://myurl.com/remote/Game';
        cc.assetManager.loadBundle(url, { version: 'xxxxx' }, (err, bundle) => {
            if (err) {
                return;
            }
            bundle.loadScene("Main", (error: Error, scene: cc.SceneAsset) => {
                if (error) {
                    return;
                }
                cc.director.runScene(scene);
            });
        });
    }
}

But another problem, Main scene from game A load another bundle with no md5, an it fail
**Download file failed: path: assets/framework/config.json.
So i must pass option { version: ‘xxxxx’ } for all function loadBundle in game A or something else?
How can i solve this?
Thanks