Ошибка с sqlalchemy во flask

from flask import Flask, render_template, request
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///shop.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)

class Item(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    price = db.Column(db.Integer, nullable=False)
    isActive = db.Column(db.Boolean, default=True)
    text = db.Column(db.Text, nullable=False)


@app.route('/')
def index():
    return render_template("index.html")


@app.route('/about')
def about():
    return render_template("about.html")


@app.route('/create', methods=['POST', 'GET'])
def create():
    if request.method == "POST":
        title = request.form['title']
        text = request.form['text']
        price = request.form['price']

    
        item = Item(title=title, text=text, price=price)

        try:
            db.session.add(item)
        db.session.commit()
            return redirect('/')
    except:
        return "Ошибка"
else:
    return render_template("create.html")

if name == "main": app.run(debug=True)