Trying to add loot to creature

When adding loot to creature on master branch I add in the database and reload but no loot drops I have even tried a server restart and no loot. Can someone tell me how to add it correctly please I have tried comparing with a npc that does have loot but it don’t seem to make any difference

I’m trying to add the item to a npc for a quest buzz box 413 as it does not drop off the mob like it should