diff --git a/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py b/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py
index 1993c9bab8..92828e60b1 100644
--- a/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py
+++ b/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py
@@ -7,8 +7,8 @@ from frappe.model.document import Document
 
 class CurrencyExchangeSettings(Document):
 	def validate(self):
-		if len(self.req_params) != 3:
-			frappe.throw(_("Make sure all the three mandatory parameters are filled."))
+		if len(self.req_params) > 3:
+			frappe.throw(_("Make sure no mandatory parameters are repeated."))
 		transaction_date = '2021-08-01'
 		from_currency = 'USD'
 		to_currency = 'INR'
@@ -23,7 +23,7 @@ class CurrencyExchangeSettings(Document):
 				params[row.key] = req_params[row.value]
 				req_params.pop(row.value)
 			except:
-				frappe.throw(_("Make sure all the three mandatory parameters are filled."))
+				frappe.throw(_("Make sure no mandatory parameters are repeated."))
 		for eparam in self.extra_params:
 			params[eparam.key] = eparam.value
 		import requests
@@ -42,7 +42,7 @@ class CurrencyExchangeSettings(Document):
 			for key in self.result_key:
 				value = value[str(key.key).format(
 					transaction_date=transaction_date,
-					to_currency=to_currency, 
+					to_currency=to_currency,
 					from_currency=from_currency
 				)]
 		except KeyError:
diff --git a/erpnext/setup/doctype/currency_exchange_settings_result/currency_exchange_settings_result.json b/erpnext/setup/doctype/currency_exchange_settings_result/currency_exchange_settings_result.json
index 4203b802fd..1b2c623867 100644
--- a/erpnext/setup/doctype/currency_exchange_settings_result/currency_exchange_settings_result.json
+++ b/erpnext/setup/doctype/currency_exchange_settings_result/currency_exchange_settings_result.json
@@ -13,13 +13,14 @@
    "fieldtype": "Data",
    "in_list_view": 1,
    "label": "Key",
-   "reqd": 1
+   "reqd": 1,
+   "unique": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-09-03 13:17:22.088259",
+ "modified": "2021-09-03 15:41:09.997576",
  "modified_by": "Administrator",
  "module": "Setup",
  "name": "Currency Exchange Settings Result",
diff --git a/erpnext/setup/install.py b/erpnext/setup/install.py
index bbee74cafb..239733a48d 100644
--- a/erpnext/setup/install.py
+++ b/erpnext/setup/install.py
@@ -57,7 +57,13 @@ def set_single_defaults():
 				pass
 			except frappe.ValidationError:
 				pass
-
+	ces = frappe.get_single('Currency Exchange Settings')
+	ces.api_endpoint = "https://api.exchangerate.host/convert"
+	ces.append('result_key', {'key': 'result'})
+	ces.append('req_params', {'key': 'date', 'value': 'transaction_date'})
+	ces.append('req_params', {'key': 'from', 'value': 'from_currency'})
+	ces.append('req_params', {'key': 'to', 'value': 'to_currency'})
+	ces.save()
 	frappe.db.set_default("date_format", "dd-mm-yyyy")