Schema must contain unique named types but contains multiple types named "MongoID"

I am facing a issue with stitching types .

```

const remoteQuery = TypeComposer.create(executableSchema._queryType);
const mutation = TypeComposer.create(executableSchema._mutationType);
const subscription = TypeComposer.create(executableSchema._subscriptionType);

GQC.rootQuery().addFields({
...remoteQuery.getFields()
});
GQC.rootMutation().addFields({
...mutation.getFields()
});

GQC.rootSubscription().addFields({
...subscription.getFields()
});
```

and then I am calling buildSchema();

Everything works fine, until I use a type that has the MongoID field.
The issue is my executableSchema already contains definitions for MongoID that can't be taken out.
Do you have a suggestion to handle this?
It won't matter if it removes duplicates or if it uses the first implementation.