current Flask app is not registered with this 'SQLAlchemy' instanceDid you forget to call 'init_app' or did you create multiple SQLAlchemy instances?

app.py:

from flask import Flask, jsonify, request, render_template, redirect, flash, url_for, session

from flask_sqlalchemy import SQLAlchemy

import hashlib

import string

import random

app = Flask(__name__)
app.template_folder = 'C:\\Users\\AloneWasser\\Desktop\\21\\templates'

app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///C:\\Users\\AloneWasser\\Desktop\\21\\instance\\data.db'

UPLOAD_FOLDER = 'C:\\Users\\AloneWasser\\Desktop\\21\\'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

db = SQLAlchemy(app)

from project.models import *

models.py:

from project.app import db

from datetime import datetime

Ошибка такова:

RuntimeError: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?

Что делать с этим? Добавляя init_app выскакивает все та же ошибка, как фиксить?