diff --git a/modules/document/queries/updateDocumentExtraKey.xml b/modules/document/queries/updateDocumentExtraKey.xml
index 07966b4fd..3c25dba8e 100644
--- a/modules/document/queries/updateDocumentExtraKey.xml
+++ b/modules/document/queries/updateDocumentExtraKey.xml
@@ -7,8 +7,8 @@
         <column name="var_type" var="var_type" notnull="notnull" />
         <column name="var_is_required" var="var_is_required" default="N" notnull="notnull" />
         <column name="var_search" var="var_search" default="N" notnull="notnull" />
-        <column name="var_default" var="var_default" notnull="notnull" />
-        <column name="var_desc" var="var_desc" notnull="notnull" />
+        <column name="var_default" var="var_default" default="" />
+        <column name="var_desc" var="var_desc" default="" />
         <column name="eid" var="eid" notnull="notnull" />
     </columns>
     <conditions>