activerecord - Ruby on Rails Redmine Active Record::Record not found for select pages -

i've started @ new company uses redmine , i've been asked upgrade 2.3.3 3.0.3 - complete novice ruby , rails seems ok far.

i've installed instance of 3.0.3 , updated database using mysqldump. seems have largely worked, random wiki pages on new redmine don't work - 404 error in browser.

everything else has succeeded - user credentials, config application, many projects, issues etc, , in fact many wikis - not of them. have been unable interpret getting error logs.

my environment details are:

• centos 6.5 / red hat 4.4.7-11 (tried on both, result same)

• ruby 1.9.3

• rails 4.2.1
• redmine 3.0.3

the output production log app below -

    activerecord::recordnotfound (couldn't find versions 'id': (all, {:include=>:attachments}) [where `versions`.`project_id` = ?] (found 0 results, looking 2)):   lib/redmine/hook.rb:119:in `block (2 levels) in render_on'   lib/redmine/hook.rb:117:in `map'   lib/redmine/hook.rb:117:in `block in render_on'   lib/redmine/hook.rb:61:in `block (2 levels) in call_hook'   lib/redmine/hook.rb:61:in `each'   lib/redmine/hook.rb:61:in `block in call_hook'   lib/redmine/hook.rb:58:in `tap'   lib/redmine/hook.rb:58:in `call_hook'   lib/redmine/hook.rb:167:in `call_hook'   app/helpers/application_helper.rb:1229:in `view_layouts_base_sidebar_hook_response'   app/views/layouts/base.html.erb:53:in `_app_views_layouts_base_html_erb__2179447321350669763_44059640'   app/controllers/wiki_controller.rb:97:in `show' 

and haven't been able find relating similar issues.

any appreciated has been dragging on long time , last step before can roll upgrade out.

thanks.

the answer incompatible plugin. download button plugin causing issue , once removed , "bundle exec rake redmine:plugins:migrate rails_env=production" run again, problem resolved.