git flow release-finish

J'utilise Maven JGit-Flow Plugin, au moment du release-finish j'obtiens l'erreur suivante:
Caused by: com.atlassian.maven.plugins.jgitflow.exception.MavenJGitFlowException: Error finishing release: local branch 'master' is behind the remote branch
at com.atlassian.maven.plugins.jgitflow.manager.DefaultFlowReleaseManager.finish(DefaultFlowReleaseManager.java:123)
at com.atlassian.maven.plugins.jgitflow.mojo.ReleaseFinishMojo.execute(ReleaseFinishMojo.java:107)



la commande git branch -vv donne:
develop fb0847d [origin/develop : en avance de 1] updating poms for 2.0.1-SNAPSHOT development
master 5e50d76 [origin/: disparue] Merge branch 'release/2.0.0-B2'
* release/2.0.0 808ccd4 Merge branch 'release/2.0.0' of http://user@server:7990/scm/intra/application.git into release/2.0.0

pourriez-vous me faire une suggestion ou m'aider à comprendre ce qui s'est passé?
Merci