fix: Display appropriate message if different Payment Terms are used …

…in PE and its Payment References (#27763)

(cherry picked from commit 9f14695)

Co-authored-by: GangaManoj <ganga.manoj98@gmail.com>
Co-authored-by: Afshan <33727827+AfshanKhan@users.noreply.github.com>

erpnext/accounts/doctype/payment_entry/payment_entry.py

@@ -390,6 +390,9 @@ def update_payment_schedule(self, cancel=0):
 						invoice_paid_amount_map[invoice_key]['discounted_amt'] = ref.total_amount * (term.discount / 100)
 
 		for key, allocated_amount in iteritems(invoice_payment_amount_map):
+			if not invoice_paid_amount_map.get(key):
+				frappe.throw(_('Payment term {0} not used in {1}').format(key[0], key[1]))
+
 			outstanding = flt(invoice_paid_amount_map.get(key, {}).get('outstanding'))
 			discounted_amt = flt(invoice_paid_amount_map.get(key, {}).get('discounted_amt'))