Redmine

Started DELETE "/projects/some_project" for 127.0.0.1 at 2015-07-15 10:54:23 +0200
Processing by ProjectsController#destroy as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"some_token", "confirm"=>"1", "commit"=>"Delete", "id"=>"cdp-rp-development-project"}
  Current user: ppo (id=95)
Completed 500 Internal Server Error in 143ms (ActiveRecord: 120.9ms)

NoMethodError (undefined method `find_all_by_user_id_and_issue_id' for #<Class:0xdf97ab0>):
  app/models/issue.rb:189:in `destroy'
  app/controllers/projects_controller.rb:224:in `destroy'

Environment:
  Redmine version                3.0.3.stable.14266
  Ruby version                   1.9.3-p327 (2012-11-10) [i686-linux]
  Rails version                  4.2.1
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.8.8
  Git                            1.7.1
  Filesystem                     
Redmine plugins:
  advanced_roadmap_v2            2.4.1
  multi_time_tracker             0.1.5
  redmine_agile                  1.3.8
  redmine_checklists             3.1.1
  redmine_hide_estimated_hours   1.0.8
  redmine_lightbox2              0.2.2
  redmine_timesheet_plugin       0.7.0
  redmine_wktime                 1.8.1
  redmine_xls_export             0.2.1.t8