diff --git a/erpnext/crm/doctype/lead/lead.py b/erpnext/crm/doctype/lead/lead.py
index 9adbe8b..c31b068 100644
--- a/erpnext/crm/doctype/lead/lead.py
+++ b/erpnext/crm/doctype/lead/lead.py
@@ -8,7 +8,6 @@
 from frappe.email.inbox import link_communication_to_document
 from frappe.model.mapper import get_mapped_doc
 from frappe.utils import (
-	cint,
 	comma_and,
 	cstr,
 	get_link_to_form,
@@ -39,11 +38,7 @@
 		self.check_email_id_is_unique()
 		self.validate_email_id()
 		self.validate_contact_date()
-		self._prev = frappe._dict({
-			"contact_date": frappe.db.get_value("Lead", self.name, "contact_date") if (not cint(self.is_new())) else None,
-			"ends_on": frappe.db.get_value("Lead", self.name, "ends_on") if (not cint(self.is_new())) else None,
-			"contact_by": frappe.db.get_value("Lead", self.name, "contact_by") if (not cint(self.is_new())) else None,
-		})
+		self.set_prev()
 
 	def set_full_name(self):
 		if self.first_name:
@@ -75,6 +70,16 @@
 		self.add_calendar_event()
 		self.update_prospects()
 
+	def set_prev(self):
+		if self.is_new():
+			self._prev = frappe._dict({
+				"contact_date": None,
+				"ends_on": None,
+				"contact_by": None
+			})
+		else:
+			self._prev = frappe.db.get_value("Lead", self.name, ["contact_date", "ends_on", "contact_by"], as_dict=1)
+
 	def before_insert(self):
 		self.contact_doc = self.create_contact()