title: Why i cant add new columns to my Users table?
body: <p>I am doing some homework. The users of my database uses some other attributes, not just the ones that ASP 2.0 automatically created for me when i implemented the login and registration mechanism. But when i try to save the modification displays me an error. Can someone give me a hand? 
  This is the error:</p>
  
  <p><img src="https://i.stack.imgur.com/BttEd.png" alt="enter image description here">
  The error says:</p>
  
  <blockquote>
    <p>'aspnet_Users' table
    - Unable to modify table.   ALTER TABLE only allows columns to be added
    that can contain nulls, or have a
    DEFAULT definition specified, or the
    column being added is an identity or
    timestamp column, or alternatively if
    none of the previous conditions are
    satisfied the table must be empty to
    allow addition of this column. Column
    'kjoptekvoten' cannot be added to
    non-empty table 'aspnet_Users' because
    it does not satisfy these conditions.</p>
  </blockquote>
  
  <p>That database was automatically created when i implemented Forms based authentification and registration. The problem now is that that users needs some more attributes. How can i give to it more attributes? What is the easiest way to do it?Does not mind if it is not theorically correct(It is just for a homework).</p>
  
  <p>I would appreciate a lot your help.</p>