Redmine 1.1.1 install problem, can you help??

[smenik]

The problem is:

rake db:migrate_plugins RAILS_ENV=production --trace
(in /var/www/vhosts/system/redmine)
** Invoke db:migrate_plugins (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
Child already added
/var/www/vhosts/system/redmine/lib/redmine/menu_manager.rb:53:in add_at' /var/www/vhosts/system/redmine/lib/redmine/menu_manager.rb:363:inpush'
/var/www/vhosts/system/redmine/vendor/plugins/redmine_sprints/init.rb:29:in evaluate_init_rb' /var/www/vhosts/system/redmine/lib/redmine/menu_manager.rb:301:inmap'
/var/www/vhosts/system/redmine/vendor/plugins/redmine_sprints/init.rb:28:in evaluate_init_rb' /var/www/vhosts/system/redmine/lib/redmine/plugin.rb:67:ininstance_eval'
/var/www/vhosts/system/redmine/lib/redmine/plugin.rb:67:in register' /var/www/vhosts/system/redmine/vendor/plugins/redmine_sprints/init.rb:15:inevaluate_init_rb'
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:158:in evaluate_init_rb' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:insilence_warnings'
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:154:in evaluate_init_rb' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:48:inload'
/var/www/vhosts/system/redmine/config/../vendor/plugins/engines/lib/engines/plugin.rb:44:in load' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:38:inload_plugins'
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:in each' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:inload_plugins'
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:369:in load_plugins' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:165:inprocess'
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in send' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:inrun'
/var/www/vhosts/system/redmine/config/environment.rb:21
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in require' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:innew_constants_in'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in require' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/misc.rake:4 /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:635:incall'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:635:in execute' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:630:ineach'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:630:in execute' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:ininvoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in synchronize' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:589:ininvoke_with_call_chain'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:606:in invoke_prerequisites' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:603:ineach'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:603:in invoke_prerequisites' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:595:ininvoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in synchronize' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:589:ininvoke_with_call_chain'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:582:in invoke' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2050:ininvoke_task'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:ineach'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:instandard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2022:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2000:inrun'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:in standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1997:inrun'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19