Null reference with gemstone

[Maplems]

[2022-09-16 18:36:12] [Fatal] MapleServer2.Network.Session: Exception in recv PipeScheduler: System.NullReferenceException: Object reference not set to an instance of an object. at MapleServer2.Types.GemSockets.CreateSockets(Item parent) in D:\Maple2\MapleServer2_20220916\MapleServer2\Types\Gemstone.cs:line 89 at MapleServer2.Types.GemSockets..ctor(Item parent) in D:\Maple2\MapleServer2_20220916\MapleServer2\Types\Gemstone.cs:line 41 at MapleServer2.Types.Item..ctor(Int32 id, Int32 amount, Int32 rarity, Boolean saveToDatabase) in D:\Maple2\MapleServer2_20220916\MapleServer2\Types\Item.cs:line 144 at MapleServer2.Managers.Actors.Npc.HandleMobKill(GameSession session, Npc npc) in D:\Maple2\MapleServer2_20220916\MapleServer2\Managers\Actors\Npc.cs:line 339 at MapleServer2.Managers.Actors.Npc.Damage(DamageHandler damage, GameSession session) in D:\Maple2\MapleServer2_20220916\MapleServer2\Managers\Actors\Npc.cs:line 108 at MapleServer2.PacketHandlers.Game.SkillHandler.HandleDamage(GameSession session, PacketReader packet) in D:\Maple2\MapleServer2_20220916\MapleServer2\PacketHandlers\Game\SkillHandler.cs:line 266 at MapleServer2.PacketHandlers.Game.SkillHandler.HandleDamageMode(GameSession session, PacketReader packet) in D:\Maple2\MapleServer2_20220916\MapleServer2\PacketHandlers\Game\SkillHandler.cs:line 160 at MapleServer2.PacketHandlers.Game.SkillHandler.Handle(GameSession session, PacketReader packet) in D:\Maple2\MapleServer2_20220916\MapleServer2\PacketHandlers\Game\SkillHandler.cs:line 34 at MapleServer2.Network.PacketRouter`1.OnPacket(Object sender, PacketReader reader) in D:\Maple2\MapleServer2_20220916\MapleServer2\Network\PacketRouter.cs:line 23 at MapleServer2.Network.Session.ReadRecvPipe(PipeReader reader) in D:\Maple2\MapleServer2_20220916\MapleServer2\Network\Session.cs:line 263