diff --git a/erpnext/crm/doctype/opportunity/opportunity.js b/erpnext/crm/doctype/opportunity/opportunity.js
index c9b0433fada..13079172fe8 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.js
+++ b/erpnext/crm/doctype/opportunity/opportunity.js
@@ -95,6 +95,7 @@ frappe.ui.form.on("Opportunity", {
 				});
 			} else {
 				frm.add_custom_button(__("Reopen"), function() {
+					frm.set_value("lost_reasons",[])
 					frm.set_value("status", "Open");
 					frm.save();
 				});
diff --git a/erpnext/selling/doctype/quotation/quotation.py b/erpnext/selling/doctype/quotation/quotation.py
index 1571c734b7f..3c8ba467680 100644
--- a/erpnext/selling/doctype/quotation/quotation.py
+++ b/erpnext/selling/doctype/quotation/quotation.py
@@ -92,6 +92,8 @@ class Quotation(SellingController):
 		self.update_lead()
 
 	def on_cancel(self):
+		if self.lost_reasons:
+			self.lost_reasons = []
 		super(Quotation, self).on_cancel()
 
 		#update enquiry status