diff --git a/concrete/config/install/packages/atomik_full/content.xml b/concrete/config/install/packages/atomik_full/content.xml
index 1e418dc9aab..0c5106b9351 100644
--- a/concrete/config/install/packages/atomik_full/content.xml
+++ b/concrete/config/install/packages/atomik_full/content.xml
@@ -442,12 +442,6 @@
                       type="topics" category="collection">
             <tree name="Blog Entries" path="/"/>
         </attributekey>
-        <attributekey handle="thumbnail" name="Thumbnail" package="" searchable="1" indexed="1" type="image_file"
-                      category="collection"/>
-        <attributekey handle="exclude_subpages_from_nav" name="Exclude Sub-Pages From Nav" package="" searchable="1"
-                      indexed="1" type="boolean" category="collection">
-            <type checked="0"/>
-        </attributekey>
     </attributekeys>
     <attributesets>
         <attributeset handle="blog" name="Blog" package="" locked="0" category="collection">