diff --git a/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.js b/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.js
index 6b0ccb7..c48bca8 100644
--- a/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.js
+++ b/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.js
@@ -2,7 +2,26 @@
 // For license information, please see license.txt
 
 frappe.ui.form.on('Currency Exchange Settings', {
-	// refresh: function(frm) {
-
-	// }
+	refresh: function(frm) {
+        frm.add_custom_button(__('Restore Defaults'), function(){
+            frm.doc.api_endpoint = "https://api.exchangerate.host/convert";
+            frm.clear_table("req_params")
+            frm.clear_table("result_key")
+            let params = {
+                date: '{transaction_date}',
+                from: '{from_currency}',
+                to: '{to_currency}'
+            }
+            var row;
+            $.each(params, function(key, value){
+                row = frm.add_child("req_params");
+                row.key = key;
+                row.value = value;
+            })
+            row = frm.add_child("result_key");
+            row.key = 'result';
+            frm.refresh_fields();
+            frm.save();
+        });
+	}
 });
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 badd14f..fa5286a 100644
--- a/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py
+++ b/erpnext/setup/doctype/currency_exchange_settings/currency_exchange_settings.py
@@ -37,7 +37,7 @@
 					to_currency=to_currency,
 					from_currency=from_currency
 				)]
-		except KeyError:
+		except Exception:
 			frappe.throw("Invalid result key. Response: " + response.text)
 		if not isinstance(value, (int, float)):
 			frappe.throw(_("Returned exchange rate is neither integer not float."))
diff --git a/erpnext/setup/doctype/currency_exchange_settings_details/currency_exchange_settings_details.json b/erpnext/setup/doctype/currency_exchange_settings_details/currency_exchange_settings_details.json
index 886d385..c9b27e1 100644
--- a/erpnext/setup/doctype/currency_exchange_settings_details/currency_exchange_settings_details.json
+++ b/erpnext/setup/doctype/currency_exchange_settings_details/currency_exchange_settings_details.json
@@ -14,8 +14,7 @@
    "fieldtype": "Data",
    "in_list_view": 1,
    "label": "Key",
-   "reqd": 1,
-   "unique": 1
+   "reqd": 1
   },
   {
    "fieldname": "value",
@@ -28,7 +27,7 @@
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-09-04 11:24:21.944002",
+ "modified": "2021-09-04 17:49:17.383982",
  "modified_by": "Administrator",
  "module": "Setup",
  "name": "Currency Exchange Settings Details",
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 1b2c623..387e245 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
@@ -13,14 +13,13 @@
    "fieldtype": "Data",
    "in_list_view": 1,
    "label": "Key",
-   "reqd": 1,
-   "unique": 1
+   "reqd": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-09-03 15:41:09.997576",
+ "modified": "2021-09-04 17:49:33.858070",
  "modified_by": "Administrator",
  "module": "Setup",
  "name": "Currency Exchange Settings Result",