diff --git a/erpnext/accounts/doctype/chart_of_accounts_importer/chart_of_accounts_importer.py b/erpnext/accounts/doctype/chart_of_accounts_importer/chart_of_accounts_importer.py
index 948be646f9..76efa486f8 100644
--- a/erpnext/accounts/doctype/chart_of_accounts_importer/chart_of_accounts_importer.py
+++ b/erpnext/accounts/doctype/chart_of_accounts_importer/chart_of_accounts_importer.py
@@ -3,6 +3,7 @@
 # For license information, please see license.txt
 
 from __future__ import unicode_literals
+from functools import reduce
 import frappe, csv
 from frappe import _
 from frappe.utils import cstr
diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index b7ab4fea13..9033f659e7 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -161,7 +161,7 @@ class PaymentEntry(AccountsController):
 					d.reference_name, self.party_account_currency)
 
 				for field, value in iteritems(ref_details):
-					if not d.get(field) or force:
+					if field == 'exchange_rate' or not d.get(field) or force:
 						d.set(field, value)
 
 	def validate_payment_type(self):
diff --git a/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json b/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
index a752c6f9a1..b6a664393e 100644
--- a/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
+++ b/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
@@ -1,345 +1,343 @@
 {
- "allow_copy": 0, 
- "allow_events_in_timeline": 0, 
- "allow_guest_to_view": 0, 
- "allow_import": 0, 
- "allow_rename": 0, 
- "beta": 0, 
- "creation": "2016-06-01 16:55:32.196722", 
- "custom": 0, 
- "docstatus": 0, 
- "doctype": "DocType", 
- "document_type": "", 
- "editable_grid": 1, 
- "engine": "InnoDB", 
+ "allow_copy": 0,
+ "allow_events_in_timeline": 0,
+ "allow_guest_to_view": 0,
+ "allow_import": 0,
+ "allow_rename": 0,
+ "beta": 0,
+ "creation": "2016-06-01 16:55:32.196722",
+ "custom": 0,
+ "docstatus": 0,
+ "doctype": "DocType",
+ "document_type": "",
+ "editable_grid": 1,
+ "engine": "InnoDB",
  "fields": [
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
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-   "fetch_if_empty": 0, 
-   "fieldname": "reference_doctype", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Type", 
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-   "no_copy": 0, 
-   "options": "DocType", 
-   "permlevel": 0, 
-   "precision": "", 
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-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
+   "allow_bulk_edit": 0,
+   "allow_in_quick_entry": 0,
+   "allow_on_submit": 0,
+   "bold": 0,
+   "collapsible": 0,
+   "columns": 2,
+   "fetch_if_empty": 0,
+   "fieldname": "reference_doctype",
+   "fieldtype": "Link",
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    "unique": 0
-  }, 
+  },
   {
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+   "allow_bulk_edit": 0,
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+   "fieldtype": "Dynamic Link",
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-  }, 
+  },
   {
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+  },
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- "modified": "2019-05-01 13:24:56.586677", 
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  "track_views": 0
 }
\ No newline at end of file
diff --git a/erpnext/regional/italy/utils.py b/erpnext/regional/italy/utils.py
index 876bdcf459..88e7c3e6f4 100644
--- a/erpnext/regional/italy/utils.py
+++ b/erpnext/regional/italy/utils.py
@@ -292,7 +292,7 @@ def prepare_and_attach_invoice(doc, replace=False):
 		"content": invoice_xml
 	})
 	_file.save()
-	return file
+	return _file
 
 @frappe.whitelist()
 def generate_single_invoice(docname):