How to create a different Maven project with major relase version?

We have current release 1.0.0 maven project and in parallel we want to work on the 2.0.0 maven project which we would like to rewrite the code from the scratch. Should we create the release 2.0.0 as new maven project, if we create as new project it fails as the artifacts name conflicts. Can you recommend how we should create 2.0.0 release and update to the SVN?

<project >  
<modelVersion>4.0.0</modelVersion>
    <groupId>org.test.demo</groupId>
    <artifactId>demo-rest</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>demo-rest</name>
    <repositories>
    ....
    </repositories>
    <properties>
       ...
    </properties>    
     <dependencies>
     ....
     </dependencies> 

</project>