diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 838c837321e..e6d090dac21 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -464,3 +464,4 @@ erpnext.patches.v16_0.set_ordered_qty_in_quotation_item
 erpnext.patches.v16_0.migrate_transaction_deletion_task_flags_to_status # 2
 erpnext.patches.v16_0.update_company_custom_field_in_bin
 erpnext.patches.v15_0.replace_http_with_https_in_sales_partner
+erpnext.patches.v15_0.delete_quotation_lost_record_detail
diff --git a/erpnext/patches/v15_0/delete_quotation_lost_record_detail.py b/erpnext/patches/v15_0/delete_quotation_lost_record_detail.py
new file mode 100644
index 00000000000..2dc37486e1c
--- /dev/null
+++ b/erpnext/patches/v15_0/delete_quotation_lost_record_detail.py
@@ -0,0 +1,11 @@
+import frappe
+from frappe.query_builder import DocType
+
+
+def execute():
+	qlr = DocType("Quotation Lost Reason Detail")
+	quotation = DocType("Quotation")
+
+	sub_query = frappe.qb.from_(quotation).select(quotation.name)
+	query = frappe.qb.from_(qlr).delete().where(qlr.parent.notin(sub_query))
+	query.run()