diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index d2245d6..15e51bb 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -319,7 +319,7 @@
 				invoice_payment_amount_map.setdefault(key, 0.0)
 				invoice_payment_amount_map[key] += reference.allocated_amount
 
-				if not invoice_paid_amount_map.get(reference.reference_name):
+				if not invoice_paid_amount_map.get(key):
 					payment_schedule = frappe.get_all('Payment Schedule', filters={'parent': reference.reference_name},
 						fields=['paid_amount', 'payment_amount', 'payment_term'])
 					for term in payment_schedule:
@@ -332,12 +332,14 @@
 				frappe.db.sql(""" UPDATE `tabPayment Schedule` SET paid_amount = `paid_amount` - %s
 					WHERE parent = %s and payment_term = %s""", (amount, key[1], key[0]))
 			else:
-				outstanding = invoice_paid_amount_map.get(key)['outstanding']
+				outstanding = flt(invoice_paid_amount_map.get(key, {}).get('outstanding'))
+
 				if amount > outstanding:
 					frappe.throw(_('Cannot allocate more than {0} against payment term {1}').format(outstanding, key[0]))
 
-				frappe.db.sql(""" UPDATE `tabPayment Schedule` SET paid_amount = `paid_amount` + %s
-						WHERE parent = %s and payment_term = %s""", (amount, key[1], key[0]))
+				if amount and outstanding:
+					frappe.db.sql(""" UPDATE `tabPayment Schedule` SET paid_amount = `paid_amount` + %s
+							WHERE parent = %s and payment_term = %s""", (amount, key[1], key[0]))
 
 	def set_status(self):
 		if self.docstatus == 2:
@@ -1091,17 +1093,20 @@
 def get_reference_as_per_payment_terms(payment_schedule, dt, dn, doc, grand_total, outstanding_amount):
 	references = []
 	for payment_term in payment_schedule:
-		references.append({
-			'reference_doctype': dt,
-			'reference_name': dn,
-			'bill_no': doc.get('bill_no'),
-			'due_date': doc.get('due_date'),
-			'total_amount': grand_total,
-			'outstanding_amount': outstanding_amount,
-			'payment_term': payment_term.payment_term,
-			'allocated_amount': flt(payment_term.payment_amount - payment_term.paid_amount,
+		payment_term_outstanding = flt(payment_term.payment_amount - payment_term.paid_amount,
 				payment_term.precision('payment_amount'))
-		})
+
+		if payment_term_outstanding:
+			references.append({
+				'reference_doctype': dt,
+				'reference_name': dn,
+				'bill_no': doc.get('bill_no'),
+				'due_date': doc.get('due_date'),
+				'total_amount': grand_total,
+				'outstanding_amount': outstanding_amount,
+				'payment_term': payment_term.payment_term,
+				'allocated_amount': payment_term_outstanding
+			})
 
 	return references