title: String or binary data would be truncated. The statement has been terminated
body: <p>I have an insert statement before these updates:
  On db.sumbitchanges the error is shown.</p>
  
  <pre><code>Topic top = (from t in db.Topics
                   where t.id == id
                   select t).SingleOrDefault();
  
  top.lastpost = username + maxdate;
  
  
  Category ca = (from c in db.Categories
               where c.categoryid == cat
               select c).SingleOrDefault();
  
  ca.totaltopics = ca.totaltopics + 1;
  ca.posts = ca.posts + 1;
  ca.lastpost = username + maxdate;
  db.SubmitChanges();     
  </code></pre>