A hack faction was introduced to avoid npcs killing each other on the pit, but this made the bears killable without the mount, this fix will just disable combat between npcs until the requested future (combat between npcs without damage) is implemented.

UPDATE `smart_scripts` SET `action_type`=18, `action_param1`=512, `comment`='Hyldsmeet Warbear - Out of Combat - Set Unit_flag immune to npc (No Repeat)' WHERE `entryorguid`=30174 AND `id`=0;