/src/server/game/Entities/Object/Object.h:540 in RemoveFromGrid ASSERTION FAILED:
    IsInGrid()

{
      public:
          bool IsInGrid() const { return _gridRef.isValid(); }
          void AddToGrid(GridRefManager<T>& m) { ASSERT(!IsInGrid()); _gridRef.link(&m, (T*)this); }
          void RemoveFromGrid() { ASSERT(IsInGrid()); _gridRef.unlink(); }
      private:
          GridReference<T> _gridRef;
};