Fix Blackwing Technician loot exploit.

sql/migrations/20240512091319_world.sql

@@ -0,0 +1,21 @@
+DROP PROCEDURE IF EXISTS add_migration;
+DELIMITER ??
+CREATE PROCEDURE `add_migration`()
+BEGIN
+DECLARE v INT DEFAULT 1;
+SET v = (SELECT COUNT(*) FROM `migrations` WHERE `id`='20240512091319');
+IF v = 0 THEN
+INSERT INTO `migrations` VALUES ('20240512091319');
+-- Add your query below.
+
+
+-- Fix Blackwing Technician loot exploit.
+UPDATE `creature_groups` SET `flags`=6 WHERE `leader_guid` IN (59768, 59771, 84542, 84557, 84558, 84625, 84840, 300979, 300980);
+
+
+-- End of migration.
+END IF;
+END??
+DELIMITER ;
+CALL add_migration();
+DROP PROCEDURE IF EXISTS add_migration;