Reward:
ItemID: 501
Amount: 50
Official Information:

Could you maybe update your issue a little, I am having a hard time trying to understand what you are saying. In some parts you are talking about the amount being a problem, in others you talk about people getting apples(which is simply what you put into the database).
@Lemongrass3110 the issue is when Amount is more than 1. Im getting warnings saying that there's no ID# of which was the amount I put.
for example:
ItemID: 501
Amount: 50
when achievement completed. warning will show up like this
[Warning]: itemdb_search: Item ID 50 does not exists in the item_db. Using dummy data.

Thanks for making it clear now!