- `project_id` int(11) NOT NULL, # project id
- `task_id` int(11) NOT NULL # task id
+ `project_id` int(11) NOT NULL, # project id
+ `task_id` int(11) NOT NULL # task id
+ `group_id` int(11) default NULL, # group id
+ `org_id` int(11) default NULL, # organization id