old_contents: from flock import db
  
  class User(db.Model):
  	id = db.Column(db.Integer, primary_key=True)
  	suggestions = db.relationship('Suggestion', secondary=suggestions,
  		backref=db.backref('users', lazy='dynamic'))
  
  	def __init__(self):
  		pass
  
new_contents: from flock import db
  
  class User(db.Model):
  	id = db.Column(db.Integer, primary_key=True)
  
  	def __init__(self):
  		pass
  
subject: Remove backrefs, for I know not what I have done.