I am having peewee.OperationalError: table taco has no column named protein, and I need help fixing this Error.

from flask import Flask, g, render_template, flash, redirect, url_for
from flask.ext.login import (LoginManager, current_user, login_user, 
                             login_required, logout_user)
from flask.ext.bcrypt import check_password_hash

import models
import forms

DEBUG = True
HOST = '0.0.0.0'
PORT = 8000

app = Flask(__name__)
app.secret_key = 'adjfdjfelnldjd23433.DJFLKDJhdjflkd(&*4545dfkjfwer'

login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'

@login_manager.user_loader
def load_user(userid):
  try:
    return models.User.get(models.User.id == int(userid))
  except models.DoesNotExist:
    return None


@app.before_request
def before_request():
  """Connect to the database before each request."""
  g.db = models.DATABASE
  g.db.connect()
  g.user = current_user


@app.after_request
def after_request(response):
  """Close the database connection after each request"""
  g.db.close()
  return response


@app.route('/register', methods=('GET', 'POST'))
def register():
  form = forms.RegisterForm()
  if form.validate_on_submit():
    flash("Thank you for registering!", "success")
    models.User.create_user(
      username=form.username.data,
      email=form.email.data,
      password=form.password.data
    )
    return redirect(url_for('index'))
  return render_template('register.html', form=form)


@app.route('/login', methods=('GET', 'POST'))
def login():
  form = forms.LoginForm()
  if form.validate_on_submit():
    try:
      user = models.User.get(models.User.email == form.email.data)
    except models.DoesNotExist:
      flash("Your email or password doesn't match!", "error")
    else:
      if check_password_hash(user.password, form.password.data):
        login_user(user)
        flash("You've been logged in!", "success")
        return redirect(url_for('index'))
      else:
        flash("Your email or password doesn't match!", "error")
  return render_template('login.html', form=form)


@app.route('/logout')
@login_required
def logout():
  logout_user()
  flash("You've been logged out! Come back soon!", "success")
  return redirect(url_for('index'))


@app.route('/taco', methods=('GET', 'POST'))
@login_required
def taco():
  form = forms.TacoForm()
  if form.validate_on_submit():
    models.Taco.create(user=g.user.id, #_get_current_object()
                       protein=form.protein.data.strip(),
                       shell=form.shell.data.strip(),
                       chesse=form.chesse.data,
                       extras=form.extras.data.strip()
                      )
    flash("Your taco has been posted. Thanks!", "success")
    return redirect(url_for('index'))
  return render_template('taco.html', form=form)


@app.route('/')
def index():
  form = models.Taco.select(100)
  return render_template('index.html', tacos=form)
  #return 'Hey!'

"""if __name__ == '__main__':
  models.initialize()
  try:
    models.User.create_user(
      username ='diegoSalas',
      email ='diegosalas00@hotmail.com',
      password ='password',
      admin = True
    )
  except ValueError:
    pass
  app.run(debug=DEBUG, host=HOST, port=PORT)"""

import datetime

from flask.ext.bcrypt import generate_password_hash
from flask.ext.login import UserMixin
from peewee import *

DATABASE = SqliteDatabase('python.db')

class User(UserMixin, Model):
  username = CharField(unique=True)
  email = CharField(unique=True)
  password = CharField(max_length=100)
  joined_at = DateTimeField(default=datetime.datetime.now)
  is_admin = BooleanField(default=False)

  class Meta:
    database = DATABASE
    order_by = ('-joined_at',)

  def get_taco(self):
    return Taco.select().where(Taco.user == self)

  def get_stream(self):
    return Taco.select().where(
      (Taco.user << self.following()) |
      (Taco.user == self)
    )

  def following(self):
    """The user we are following."""
    return(
      User.select().join(
        Relationship, on=Relationship.to_user
      ).where(
        Relationship.from_user==self
    ))

  @classmethod
  def create_user(cls, username, email, password, admin=False):
    try:
      with DATABASE.transaction():
        cls.create(
          username=username,
          email=email,
          password=generate_password_hash(password),
          is_admin=admin
        )
    except IntegrityError:
      raise ValueError("User already exist")


class Taco(Model):
  timestamp = DateTimeField(default=datetime.datetime.now)
  user = ForeignKeyField(
    rel_model=User,
    related_name='tacos'
  )
  protein = CharField(max_length=100)
  chesse = BooleanField()
  shell = CharField(max_length=100)
  extras = TextField()

  class Meta:
    database = DATABASE
    ordered_by = ('-timestamp',)


'''class Relationship(Model):
  from_user = ForeignKeyField(User, related_name='relationships')
  to_user = ForeignKeyField(User, related_name='related_to')

  class Meta:
    database = DATABASE
    indexs = (
      (('from_user', 'to_user'), True)
    )'''


def initialize():
  DATABASE.connect()
  DATABASE.create_tables([User, Taco], safe=True)
  DATABASE.close()

from flask_wtf import Form
from wtforms import StringField, PasswordField, TextAreaField, BooleanField
from wtforms.validators import (DataRequired, Regexp, Email, ValidationError,
                                Length, EqualTo)

from models import User


def name_exists(form, field):
  if User.select().where(User.username == field.data).exists():
    raise ValidationError('User with that name already exists.')


def email_exists(form, field):
  if User.select().where(User.username == field.data).exists():
    raise ValidationError('User with that name already exists.')


class RegisterForm(Form):
  username = StringField(
    'Username',
    validators=[
      DataRequired(),
      Regexp(
        r'^[a-zA-Z0-9_]+$',
        message=("Username should be one word, letters, "
                 "numbers, and underscores only.")
      ),
      name_exists
    ])
  email = StringField(
    'Email',
    validators=[
      DataRequired(),
      Email(),
      email_exists
    ])
  password = PasswordField(
    'Password',
    validators=[
      DataRequired(),
      Length(min=4),
      EqualTo('password2', message='Password must match')
    ])
  password2 = PasswordField(
    'Confirm Password',
    validators=[DataRequired()]
  )

class LoginForm(Form):
  email = StringField('Email', validators=[DataRequired(), Email()])
  password = PasswordField('Password', validators=[DataRequired()])


class TacoForm(Form):
  """Create a Form to order a taco"""
  protein = StringField("Meat?, Chicken?, Pork?, Veggie?", validators=[DataRequired()])
  shell = StringField("Corn?, Wheat?, Crispy?, Soft?", validators=[DataRequired()])
  chesse = BooleanField("Cheese?", default=True)
  extras = StringField("Anything Else?", validators=[DataRequired()])