--- alter-project-options-add-scale
alter table project_options add rating_scale_to integer default null;
alter table project_options add rating_scale_from integer default null;
alter table project_options add good_scale_from integer default null;
alter table project_options add good_scale_to integer default null;
alter table project_options add bad_scale_from integer default null;
alter table project_options add bad_scale_to integer default null;