title: Why does change from Spring boot version 2.1.4 to 2.1.5 gives unknown configuration Maven error?
body: <p>I had installed Eclipse (actually Spring Tool Suite). It came with Maven. I had created Spring boot starter projects.  Maven was downloading all the dependencies and things were working fine.</p>
  
  <p>Recently, I created a new project.  This time, I noticed an error in pom.xml 
  and the problem window (in STS) showing the following:</p>
  
  <pre><code>Description Resource    Path                    Location   Type
  Unknown     pom.xml     /TestSessionAttribute   line 1     Maven Configuration Problem
  </code></pre>
  
  <p>I noticed that the spring boot version was at 2.1.5 (it was 2.1.4 before).  </p>
  
  <pre><code>&lt;parent&gt;
      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
      &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
      &lt;version&gt;2.1.5.RELEASE&lt;/version&gt;
      &lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
  &lt;/parent&gt;
  </code></pre>
  
  <p>I went ahead and did an update of the project (Maven > Update project) with the 'Force Update of Snapshots/Releases' checked.  This did not resolve the problem. 
  I do see the </p>
  
  <pre><code>spring-boot-2.1.5.RELEASE.jar
  </code></pre>
  
  <p>in the m2 repository.</p>
  
  <p>I went back and changed the version to 2.1.4 and then a Maven > Update Project and the errors went away.</p>
  
  <p>Why am I getting the Maven error when version is 2.1.5?</p>