diff --git a/erpnext/patches/patch_list.py b/erpnext/patches/patch_list.py
index e14be4b..92e48a0 100644
--- a/erpnext/patches/patch_list.py
+++ b/erpnext/patches/patch_list.py
@@ -600,4 +600,8 @@
 		'patch_module': 'patches.september_2012',
 		'patch_file': 'reload_gross_profit',
 	},
+	{
+		'patch_module': 'patches.september_2012',
+		'patch_file': 'rebuild_trees',
+	},
 ]
diff --git a/erpnext/patches/september_2012/rebuild_trees.py b/erpnext/patches/september_2012/rebuild_trees.py
new file mode 100644
index 0000000..8340df7
--- /dev/null
+++ b/erpnext/patches/september_2012/rebuild_trees.py
@@ -0,0 +1,9 @@
+def execute():
+	from webnotes.utils.nestedset import rebuild_tree
+
+	rebuild_tree("Item Group", "parent_item_group")
+	rebuild_tree("Customer Group", "parent_customer_group")
+	rebuild_tree("Territory", "parent_territory")
+	rebuild_tree("Account", "parent_account")
+	rebuild_tree("Cost Center", "parent_cost_center")
+	rebuild_tree("Sales Person", "parent_sales_person")
\ No newline at end of file