diff --git a/storage/itemgroup.lua b/storage/itemgroup.lua
index 448c4bd..05a4fa7 100644
--- a/storage/itemgroup.lua
+++ b/storage/itemgroup.lua
@@ -95,7 +95,6 @@ function ItemGroup:canAddStack(stack)
             return true
         end
     end
-    self:_addStack(stack)
     return true
   end
   return false