fix: update lead if contact details are changed

erpnext/crm/utils.py

@@ -0,0 +1,24 @@
+import frappe
+
+
+def update_lead_phone_numbers(contact, method):
+	if contact.phone_nos:
+		contact_lead = contact.get_link_for("Lead")
+		if contact_lead:
+			phone = mobile_no = contact.phone_nos[0].phone
+
+			if len(contact.phone_nos) > 1:
+				# get the default phone number
+				primary_phones = [phone.phone for phone in contact.phone_nos if phone.is_primary_phone]
+				if primary_phones:
+					phone = primary_phones[0]
+
+				# get the default mobile number
+				primary_mobile_nos = [phone.phone for phone in contact.phone_nos if phone.is_primary_mobile_no]
+				if primary_mobile_nos:
+					mobile_no = primary_mobile_nos[0]
+
+			lead = frappe.get_doc("Lead", contact_lead)
+			lead.phone = phone
+			lead.mobile_no = mobile_no
+			lead.save()