[fix] routing for item group
diff --git a/erpnext/setup/doctype/item_group/item_group.py b/erpnext/setup/doctype/item_group/item_group.py
index dc6d2d9..5375db0 100644
--- a/erpnext/setup/doctype/item_group/item_group.py
+++ b/erpnext/setup/doctype/item_group/item_group.py
@@ -38,7 +38,10 @@
if not self.route:
self.route = ''
if self.parent_item_group:
- self.route = frappe.get_doc('Item Group', self.parent_item_group).route + '/'
+ parent_route = frappe.get_doc('Item Group', self.parent_item_group).route
+
+ if parent_route:
+ self.route = parent_route + '/'
self.route += self.scrub(self.item_group_name)