[m2e-dev] Conflicting lifecycle mapping ?

[Cristiano Gavião <cvgaviao@xxxxxxxxx>]

Hi,

I'm trying to build tycho and tycho-demo (from https://github.com/sonatype/sonatype-tycho) using m2eclipse (0.13.0).

Could someone explain me what mean this error: 

Conflicting lifecycle mapping (plugin execution "org.apache.maven.plugins:maven-jar-plugin:2.3.1:jar (execution: default-jar, phase: package)"). To enable full functionality, remove the conflicting mapping and run Maven->Update Project Configuration.

How could this be resolved?

thanks

Cristiano