title: what does this error mean in nhibernate
body: <p>Out of the blue, i am getting this error when doing a number of updates using nhibernate.</p>
  
  <p><strong>Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [MyDomainObject]</strong></p>
  
  <p>there is no additional information in the error.  Is there some recommended way to help identify the root issue or can someone give me a better explanation on what this error indicated or is a sympton around.</p>
  
  <h2>Some additional info</h2>
  
  <p>I looked at the object and all of the data looks fine, it has an ID, etc . .</p>
  
  <p>Note this is running in a single call stack from an asp.net-mvc website so i wouldn't expect there to be any threading issues to worry about in terms of concurrency.</p>