[fix] delete lead addresses in delete company transaction
diff --git a/erpnext/setup/doctype/company/delete_company_transactions.py b/erpnext/setup/doctype/company/delete_company_transactions.py
index ba2a5b8..ff6810d 100644
--- a/erpnext/setup/doctype/company/delete_company_transactions.py
+++ b/erpnext/setup/doctype/company/delete_company_transactions.py
@@ -17,16 +17,16 @@
 		frappe.throw(_("Transactions can only be deleted by the creator of the Company"), frappe.PermissionError)
 
 	delete_bins(company_name)
-	
 	delete_time_logs(company_name)
+	delete_lead_addresses(company_name)
 
 	for doctype in frappe.db.sql_list("""select parent from
 		tabDocField where fieldtype='Link' and options='Company'"""):
-		if doctype not in ("Account", "Cost Center", "Warehouse", "Budget Detail", 
-			"Party Account", "Employee", "Sales Taxes and Charges Template", 
+		if doctype not in ("Account", "Cost Center", "Warehouse", "Budget Detail",
+			"Party Account", "Employee", "Sales Taxes and Charges Template",
 			"Purchase Taxes and Charges Template", "POS Profile"):
 				delete_for_doctype(doctype, company_name)
-			
+
 	# Clear notification counts
 	clear_notifications()
 
@@ -73,15 +73,22 @@
 	# Delete Time Logs as it is linked to Production Order / Project / Task, which are linked to company
 	frappe.db.sql("""
 		delete from `tabTime Log`
-		where 
-			(ifnull(project, '') != '' 
+		where
+			(ifnull(project, '') != ''
 				and exists(select name from `tabProject` where name=`tabTime Log`.project and company=%(company)s))
-			or (ifnull(task, '') != '' 
+			or (ifnull(task, '') != ''
 				and exists(select name from `tabTask` where name=`tabTime Log`.task and company=%(company)s))
-			or (ifnull(production_order, '') != '' 
-				and exists(select name from `tabProduction Order` 
+			or (ifnull(production_order, '') != ''
+				and exists(select name from `tabProduction Order`
 					where name=`tabTime Log`.production_order and company=%(company)s))
-			or (ifnull(sales_invoice, '') != '' 
-				and exists(select name from `tabSales Invoice` 
+			or (ifnull(sales_invoice, '') != ''
+				and exists(select name from `tabSales Invoice`
 					where name=`tabTime Log`.sales_invoice and company=%(company)s))
-	""", {"company": company_name})
\ No newline at end of file
+	""", {"company": company_name})
+
+def delete_lead_addresses(company_name):
+	"""Delete addresses to which leads are linked"""
+	frappe.db.sql("""delete from `tabAddress`
+		where (customer='' or customer is null) and (supplier='' or supplier is null) and (lead != '' and lead is not null)""")
+
+	frappe.db.sql("""update `tabAddress` set lead=null, lead_name=null""")