diff --git a/gramps/plugins/db/dbapi/dbapi.py b/gramps/plugins/db/dbapi/dbapi.py
index 5706fae7a..b222f5a93 100644
--- a/gramps/plugins/db/dbapi/dbapi.py
+++ b/gramps/plugins/db/dbapi/dbapi.py
@@ -330,9 +330,11 @@ class DBAPI(DbGeneric):
         """
         Return the defined names that have been assigned to a default grouping.
         """
-        self.dbapi.execute("SELECT name FROM name_group ORDER BY name")
+        self.dbapi.execute("SELECT name, grouping FROM name_group "
+                           "ORDER BY name")
         rows = self.dbapi.fetchall()
-        return [row[0] for row in rows]
+        # not None test below fixes db corrupted by 11011 for export
+        return [row[0] for row in rows if row[1] is not None]
 
     def get_name_group_mapping(self, key):
         """
@@ -341,7 +343,8 @@ class DBAPI(DbGeneric):
         self.dbapi.execute(
             "SELECT grouping FROM name_group WHERE name = ?", [key])
         row = self.dbapi.fetchone()
-        if row:
+        if row and row[0] is not None:
+            # not None test fixes db corrupted by 11011
             return row[0]
         else:
             return key
@@ -566,7 +569,7 @@ class DBAPI(DbGeneric):
         self.dbapi.execute("SELECT grouping FROM name_group WHERE name = ?",
                            [key])
         row = self.dbapi.fetchone()
-        return True if row else False
+        return row and row[0] is not None
 
     def set_name_group_mapping(self, name, grouping):
         """
diff --git a/gramps/plugins/importer/importxml.py b/gramps/plugins/importer/importxml.py
index fd483088c..133cb65aa 100644
--- a/gramps/plugins/importer/importxml.py
+++ b/gramps/plugins/importer/importxml.py
@@ -1758,7 +1758,7 @@ class GrampsParser(UpdateCallback):
                             ' with "%(parent)s", did not change this grouping to "%(value)s".') % {
                             'key' : key, 'parent' : present, 'value' : value }
                     self.user.warn(_("Gramps ignored a name grouping"), msg)
-            else:
+            elif value != 'None':  # None test fixes file corrupted by 11011
                 self.db.set_name_group_mapping(key, value)
 
     def start_last(self, attrs):