OverwriteModelError: Cannot overwrite model once compiled. When already defined in Mongoose | PayloadCMS v3.1.0

[AshKetshup]

Hi, I'm using Payload v3.1.0 with MongoDB so I can manage a few collections and in the same server i'm also managing with mongoose directly some schemas and models that coexist with Payload collections. One of them is my languages model.

Defined by the following through Mongoose:

import mongoose from "mongoose";

const languagesStruct = {
    _id: mongoose.Schema.Types.ObjectId,
    name: String,
    isDefault: Boolean, 
}

const languagesSchema = new mongoose.Schema(languagesStruct);
const languagesModel  = mongoose.model('languages', languagesSchema);

And later as a Payload Collection:

// Languages Collection
const languageFields: Field[] = [
    { name: 'name', type: 'text' },
    { name: 'isDefault', type: 'checkbox' }
]

const Languages: CollectionConfig = {
    slug: 'languages',
    admin: { useAsTitle: 'name' },
    fields: languageFields,
    access: {
        read  : () => true, // allows public GET
        update: () => true, // allows public PATCH
        create: () => true, // allows public POST
        delete: () => true, // allows public DELETE
    },
}

Although during compilation Payload says that it can't overwrite. My intentions are in fact for using the same Model both in Payload and Mongoose. Do you think there's a way to do this? If so, how?

[AshKetshup]

Update: I've been looking into Accessing Mongoose Models through Payload and tried to apply them.
Instead of redeclaring the Schema and Model I just use payload.db.collections['languages'] and .schema to access them. Although, while running Payload has both payload.db and consequently payload.db.collections empty.