old_contents: import datetime, re;
  from sqlalchemy.orm import validates;
  from server import DB, FlaskServer;
  
  
  class Owners(DB.Model):
  	id = DB.Column(DB.Integer, primary_key=True, autoincrement=True);
  	name = DB.Column(DB.String(80));
  	notation = DB.Column(DB.Text, nullable=True);
  	created_by = DB.Column(DB.Integer, DB.ForeignKey('users.id'));
  	created_at = DB.Column(DB.DateTime);
  	updated_by = DB.Column(DB.Integer, DB.ForeignKey('users.id'), nullable=True);
  	updated_at = DB.Column(DB.DateTime, nullable=True);
  
  	def __init__(self, name, notation, created_at, updated_at):
  		self.name = name;
  		self.notation = notation;
  		self.created_at = datetime.datetime.now();
  		self.updated_at = self.created_at;
  
  
new_contents: import datetime, re;
  from sqlalchemy.orm import validates;
  from server import DB, FlaskServer;
  
  
  class Owners(DB.Model):
  	id = DB.Column(DB.Integer, primary_key=True, autoincrement=True);
  	name = DB.Column(DB.String(80));
  	notation = DB.Column(DB.Text, nullable=True);
  	created_by = DB.Column(DB.Integer, DB.ForeignKey('users.id'));
  	created_at = DB.Column(DB.DateTime);
  	updated_by = DB.Column(DB.Integer, DB.ForeignKey('users.id'));
  	updated_at = DB.Column(DB.DateTime, nullable=True);
  
  	def __init__(self, name, notation, created_at, updated_at):
  		self.name = name;
  		self.notation = notation;
  		self.created_at = datetime.datetime.now();
  		self.updated_at = self.created_at;
  
  
subject: Update owners.py