Redmine

I've try to migrate project from Trac 0.11.7 as shown in RedmineMigrate to Redmine 1.0.2. Data was successfully copied but I saw some problems:

1. New field «Resolution» appears in Issues (I remove that field).
2. Some pages in Redmine now doesn't work (Issue list, Migrated issues) — I see Internal Server error, but new issues, which made after migration, shows correctly.

I see in log/production.log:

Processing IssuesController#index (for MY.IP.HERE at 2010-10-11 13:36:41) [GET]
  Parameters: {"project_id"=>"PROJECTNAME", "action"=>"index", "controller"=>"issues"}
Rendering template within layouts/base
Rendering issues/index.rhtml

ActionView::TemplateError (comparison of Fixnum with nil failed) on line #16 of app/views/issues/_list.rhtml:
13:     </tr></thead>
14:     <% previous_group = false %>
15:     <tbody>
16:     <% issue_list(issues) do |issue, level| -%>
17:   <% if @query.grouped? && (group = @query.group_by_column.value(issue)) != previous_group %>
18:     <% reset_cycle %>
19:     <tr class="group open">

    app/helpers/issues_helper.rb:24:in `issue_list'
    app/helpers/issues_helper.rb:23:in `each'
    app/helpers/issues_helper.rb:23:in `issue_list'
    app/views/issues/_list.rhtml:16
    app/views/issues/_list.rhtml:1:in  `_run_rhtml_app47views47issues47_list46rhtml_locals_issues_list_object_query'
    app/views/issues/index.rhtml:63:in `_run_rhtml_app47views47issues47index46rhtml'
    app/controllers/issues_controller.rb:84
    app/controllers/issues_controller.rb:83:in `index'
    thin (1.2.4) lib/thin/connection.rb:76:in `pre_process'
    thin (1.2.4) lib/thin/connection.rb:74:in `catch'
    thin (1.2.4) lib/thin/connection.rb:74:in `pre_process'
    thin (1.2.4) lib/thin/connection.rb:57:in `process'
    thin (1.2.4) lib/thin/connection.rb:42:in `receive_data'
    eventmachine (0.12.10) lib/eventmachine.rb:256:in `run_machine'
    eventmachine (0.12.10) lib/eventmachine.rb:256:in `run'
    thin (1.2.4) lib/thin/backends/base.rb:57:in `start'
    thin (1.2.4) lib/thin/server.rb:156:in `start'
    thin (1.2.4) lib/thin/controllers/controller.rb:80:in `start'
    thin (1.2.4) lib/thin/runner.rb:174:in `send'
    thin (1.2.4) lib/thin/runner.rb:174:in `run_command'
    thin (1.2.4) lib/thin/runner.rb:140:in `run!'
    thin (1.2.4) bin/thin:6
    /usr/local/bin/thin:19:in `load'
    /usr/local/bin/thin:19

Rendering /usr/local/www/redmine/public/500.html (500 Internal Server Error)

I make migration procedure:

rake db:migrate RAILS_ENV=production 
(in /usr/local/www/redmine)

rake db:migrate:upgrade_plugin_migrations RAILS_ENV=production 
(in /usr/local/www/redmine)
Cannot find old migration table - assuming nothing needs to be done

rake db:migrate_plugins RAILS_ENV=production
(in /usr/local/www/redmine)
Migrating engines...
Migrating acts_as_activity_provider...
Migrating acts_as_attachable...
Migrating acts_as_customizable...
Migrating acts_as_event...
Migrating acts_as_list...
Migrating acts_as_rated...
Migrating acts_as_searchable...
Migrating acts_as_taggable_on_steroids...
Migrating acts_as_tree...
Migrating acts_as_versioned...
Migrating acts_as_viewed...
Migrating acts_as_watchable...
Migrating awesome_nested_set...
Migrating classic_pagination...
Migrating coderay-0.9.2...
Migrating gravatar...
Migrating menu_link...
Migrating open_id_authentication...
Migrating prepend_engine_views...
Migrating redmine_knowledgebase...
Migrating redmine_opensearch...
Migrating rfpdf...
Migrating ruby-net-ldap-0.0.4...

I restart server, but this restart didn't help.
I've try clear cache:

rake tmp:cache:clear
rake tmp:sessions:clear

and restart server again, but errors still remains.