title: Are SDK's mutually exclusive in an Intellij Module?
body: <p>I have a mixed scala/python maven module.  I primarily do scala development but in order to do some python work I changed the SDK to python.</p>
  
  <p>Now I can not do scala.  So is there no way to have both be available? Do I need to manually switch back and forth??</p>
  
  <p><img src="https://i.stack.imgur.com/STJ0x.png" alt="enter image description here"></p>
  
  <p>Here is what happened after selecting the python sdk, and attempting to run a scala test class:</p>
  
  <p><img src="https://i.stack.imgur.com/cQF6X.png" alt="enter image description here"></p>
  
  <p><strong>UPDATE</strong>   It appears the situation is <em>worse</em> than anticipated: I can not even switch back to scala at all. Did the project get corrupted??</p>
  
  <p>Here is the error shown in the screenshot:</p>
  
  <pre><code>Error:scalac: error while loading package, Missing dependency 'object java.lang.Object in compiler mirror', required by /Users/steve/.m2/repository/org/scala-lang/scala-library/2.10.4/scala-library-2.10.4.jar(scala/package.class)
  </code></pre>