title: How can I resolve the conflict cross-version suffixes?
body: <p>I have just started working with scala, play and mongodb which is why I am struggling to figure out what I need to change.</p>
  
  <p>I have done a lot of research and seen many questions on here with a similar problem however I can't seem to work out how to solve it.  </p>
  
  <p><a href="https://i.stack.imgur.com/CSxkl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CSxkl.png" alt="[1]"></a></p>
  
  <p>These are the dependencies that I have to add:</p>
  
  <pre><code>"org.mongodb" %% "casbah" % "3.1.1",
  "com.novus" % "salat-core_2.10" % "1.9.9"
  </code></pre>
  
  <p>at least I believe those are the correct ones. However I keep getting an error when I build the project. Am working along side a tutorial, which I know is outdated and I believe that is where it lies, however trying to 'update' the dependencies (at least I think I am) is not working.</p>
  
  <p>This is the error I keep getting</p>
  
  <p><a href="https://i.stack.imgur.com/6OmYr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6OmYr.png" alt="[2]"></a></p>