title: Cannot change version of project facet Dynamic Web Module to 2.5
body: <p>I've inherited a Java web app from another company. I'm trying to load it into Eclipse (via Import Maven Project), and getting an error that says "Cannot change version of project facet Dynamic Web Module to 2.5".</p>
  
  <p>I've been poking around a little, and one thing I'm finding is that the web.xml file starts with </p>
  
  <pre><code>&lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
      id="WebApp_ID" version="2.5"&gt;
  </code></pre>
  
  <p>and the pom.xml specifies a dependency of </p>
  
  <pre><code>    &lt;dependency&gt;
          &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
          &lt;artifactId&gt;servlet-api&lt;/artifactId&gt;
          &lt;version&gt;2.5&lt;/version&gt;
          &lt;scope&gt;provided&lt;/scope&gt;
      &lt;/dependency&gt;
  </code></pre>
  
  <p>but the .settings folder contains a file with this</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;faceted-project&gt;
    &lt;fixed facet="wst.jsdt.web"/&gt;
    &lt;installed facet="java" version="1.6"/&gt;
    &lt;installed facet="jst.web" version="3.0"/&gt;
    &lt;installed facet="wst.jsdt.web" version="1.0"/&gt;
  &lt;/faceted-project&gt;
  </code></pre>
  
  <p>and I suspect that the 3.0 specified here is conflicting with the 2.5 specified elsewhere. Is that likely to be the case? Is there any way this combination of settings could NOT result in errors? (Older version of Eclipse, eg?)</p>