Core/PacketIO: Fixed building SMSG_UPDATE_OBJECT for array fields sharing the same initial bit index after ClearChanged was called on one of them

src/server/game/Entities/Object/Updates/UpdateField.h

@@ -558,7 +558,6 @@ namespace UF
         {
             static_assert(std::is_base_of<Base, Derived>::value, "Given field argument must belong to the same structure as this HasChangesMask");
 
-            _changesMask.Reset(Bit);
             _changesMask.Reset(FirstElementBit + index);
         }