title: slf4j.Marker incompatible types
body: <p>I have been using slf4j this way and all is fine:</p>
  
  <pre><code>LOGGER.info("classification: {} {} {}", classification, question, id); 
  </code></pre>
  
  <p>But suddenly I am not aware of any changes that is causing this error messages:</p>
  
  <pre><code>Error:(50, 25) java: incompatible types: java.lang.String cannot be converted to org.slf4j.Marker
  </code></pre>
  
  <p>In command line, 'mvn clean install' compiles fine. But in IntelliJ when I tried to start an application, the error message above pops up.</p>
  
  <p>What's wrong here?</p>