It will be very nice if you collect all your issues in notepad then post all of them in 1 thread, opening 100 threads with every problem, is kinda spamming
if you use the search button , you will find your answer
Code:
USE SRO_VT_SHARD -- name of your database
DELETE FROM _RefMonster_AssignedItemDrop where RefitemID = 'tablet ID'
to get tabled ID execute this querry
SELECT ID From dbo._RefObjCommon Where CodeName128 like 'Tablet or item name which you want to remove')
then restart your gameserver