diff --git a/MVMCoreUI/OtherHandlers/MVMCoreUIMoleculeMappingObject.m b/MVMCoreUI/OtherHandlers/MVMCoreUIMoleculeMappingObject.m
index ff0a6056..0aee8405 100644
--- a/MVMCoreUI/OtherHandlers/MVMCoreUIMoleculeMappingObject.m
+++ b/MVMCoreUI/OtherHandlers/MVMCoreUIMoleculeMappingObject.m
@@ -73,7 +73,6 @@
                      @"headlineBodyButton": HeadlineBodyButton.class,
                      @"stackItem": StackItem.class,
                      @"eyebrowHeadlineBodyLink": EyebrowHeadlineBodyLink.class,
-                     @"stackItem": StackItem.class,
                      @"unOrderedList": UnOrderedList.class,
                      @"numberedList": NumberedList.class,
                      @"headLineBodyCaretLinkImage" : HeadLineBodyCaretLinkImage.class