Deleting ai tasks/goals block breaks entity permanently

So early on when I made my entity I deleted the ai goals/tasks block at the top of ai. Just dragged it into the trash can. Now, almost a month later, I realize the entity cannot move or use ai tasks. Please, this is the most complex mod I have ever created and it has mountains of procedures referencing it in synced data. If it is possible, I would be ecstatic could I fix this without recreating the entire entity. 
Please, is someone is out there, Klemens maybe, help me, or maybe make a feature to reset the ai tasks list to default