When deleted items from WEB GUI,the trends_uint recode will not be deleted from DB.

\frontends\php\include\items.inc.php
function delete_trends_by_itemid($itemids, $use_housekeeper=0){
zbx_value2array($itemids);

if($use_housekeeper){
foreach($itemids as $id => $itemid)

{ $housekeeperid = get_dbid('housekeeper','housekeeperid'); DBexecute('INSERT INTO housekeeper (housekeeperid,tablename,field,value)'. " VALUES ($housekeeperid, 'trends','itemid',$itemid)"); }

return TRUE;
}
return DBexecute('DELETE FROM trends WHERE '.DBcondition('itemid',$itemids));
}

As shown as the function,the trends_uint will not be added to housekeeper table.