While working on maven project, encountered an error:

Cannot change version of project facet Dynamic Web Module to 2.3.     line 1 Maven Java EE Configuration Problem

When I tried to run the project it was running fine but always giving the error on eclipse. To remove this error:

1) Click on Project->Properties->Project Facets - Change Java to 1.5, uncheck Dynamic web module and click ok.

2) Check your pom.xml and find build. Change configuration to 1.7

<build>
    <finalName>Test
    </finalName>
	  <pluginManagement>
	   <plugins>
	    <plugin>
	        <groupId>org.apache.maven.plugins</groupId>
	        <artifactId>maven-compiler-plugin</artifactId>          
	        <configuration>
	            <source>1.7</source>
	            <target>1.7</target>
	        </configuration>
	    </plugin>
	   </plugins>
	  </pluginManagement>
 </build>

3) Go to maven -> Update Project. 

4) Change Dynamic web module to 3.1