plugin_migrate failed

[web50-zz]

HI, i've git clone scrum-pm today trying to install and have next error:

rake RAILS_ENV=production db:migrate_plugins --trace (in /home/server/web/documents/redmine) * Invoke db:migrate_plugins (first_time) * Invoke environment (first_time) \ Execute environment rake aborted! Child already added /home/server/web/documents/redmine/lib/redmine/menu_manager.rb:53:in add_at' /home/server/web/documents/redmine/lib/redmine/menu_manager.rb:358:inpush' /home/server/web/documents/redmine/vendor/plugins/redmine_sprints/init.rb:27:in evaluate_init_rb' /home/server/web/documents/redmine/lib/redmine/menu_manager.rb:296:inmap' /home/server/web/documents/redmine/vendor/plugins/redmine_sprints/init.rb:26:in evaluate_init_rb' /home/server/web/documents/redmine/lib/redmine/plugin.rb:67:ininstance_eval' /home/server/web/documents/redmine/lib/redmine/plugin.rb:67:in register' /home/server/web/documents/redmine/vendor/plugins/redmine_sprints/init.rb:13:inevaluate_init_rb' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin.rb:158:in evaluate_init_rb' /home/server/web/documents/redmine/vendor/rails/activesupport/lib/active_support/core_ext/kernel/reporting.rb:11:insilence_warnings' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin.rb:154:in evaluate_init_rb' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin.rb:48:inload' /home/server/web/documents/redmine/config/../vendor/plugins/engines/lib/engines/plugin.rb:44:in load' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin/loader.rb:38:inload_plugins' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin/loader.rb:37:in each' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/rails/plugin/loader.rb:37:inload_plugins' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/initializer.rb:369:in load_plugins' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/initializer.rb:165:inprocess' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/initializer.rb:113:in send' /home/server/web/documents/redmine/config/../vendor/rails/railties/lib/initializer.rb:113:inrun' /home/server/web/documents/redmine/config/environment.rb:20 /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:inrequire' /home/server/web/documents/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in require' /home/server/web/documents/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:innew_constants_in' /home/server/web/documents/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in require' /home/server/web/documents/redmine/vendor/rails/railties/lib/tasks/misc.rake:4 /usr/lib/ruby/1.8/rake.rb:636:incall' /usr/lib/ruby/1.8/rake.rb:636:in execute' /usr/lib/ruby/1.8/rake.rb:631:ineach' /usr/lib/ruby/1.8/rake.rb:631:in execute' /usr/lib/ruby/1.8/rake.rb:597:ininvoke_with_call_chain' /usr/lib/ruby/1.8/monitor.rb:242:in synchronize' /usr/lib/ruby/1.8/rake.rb:590:ininvoke_with_call_chain' /usr/lib/ruby/1.8/rake.rb:607:in invoke_prerequisites' /usr/lib/ruby/1.8/rake.rb:604:ineach' /usr/lib/ruby/1.8/rake.rb:604:in invoke_prerequisites' /usr/lib/ruby/1.8/rake.rb:596:ininvoke_with_call_chain' /usr/lib/ruby/1.8/monitor.rb:242:in synchronize' /usr/lib/ruby/1.8/rake.rb:590:ininvoke_with_call_chain' /usr/lib/ruby/1.8/rake.rb:583:in invoke' /usr/lib/ruby/1.8/rake.rb:2051:ininvoke_task' /usr/lib/ruby/1.8/rake.rb:2029:in top_level' /usr/lib/ruby/1.8/rake.rb:2029:ineach' /usr/lib/ruby/1.8/rake.rb:2029:in top_level' /usr/lib/ruby/1.8/rake.rb:2068:instandard_exception_handling' /usr/lib/ruby/1.8/rake.rb:2023:in top_level' /usr/lib/ruby/1.8/rake.rb:2001:inrun' /usr/lib/ruby/1.8/rake.rb:2068:in standard_exception_handling' /usr/lib/ruby/1.8/rake.rb:1998:inrun' /usr/bin/rake:28

[software-project]

You have prevously installed a plugin that adds dashboard or backlog tab to menu. To make my plugin work you have to uninstall that plugin.