Impossible to see what the mob WILL drop instead of what the mob CAN drop because the chance of drop and the "YES/NO" is decided at the death of the mob, not at his spawn. Did you think a mob had this infos in his enterworld :P ?
You try to add a line with an ID ( this ID is 40006 ) and this line already exists, at least, there is a line with this ID in your database yet.
Chaange the 40006 in your SQL query to an unexisting ID, an ID in SQL should be unique, always !