change_column :issues, :reporter, :string, :null => true, :limit => 255
change_column :issues, :assignee, :string, :null => true, :limit => 255
change_column :issues, :author_login, :string, :null => true, :limit => 255
- change_column :issue_filter_favourites, :user_login, :string, :null => false, :limit => 255
+ change_column :issue_filter_favourites, :user_login, :string, :limit => 255
change_column :issue_filters, :user_login, :string, :null => true, :limit => 255
change_column 'manual_measures', :user_login, :string, :null => true, :limit => 255
change_column :rules, :note_user_login, :string, :null => true, :limit => 255