diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index 89a6dcd1cb0..4465d4ff7f0 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -180,8 +180,8 @@ class AccountInvoice(models.Model):
     def _compute_payments(self):
         payment_lines = []
         for line in self.move_id.line_ids:
-            payment_lines.extend([rp.credit_move_id.id for rp in line.matched_credit_ids])
-            payment_lines.extend([rp.debit_move_id.id for rp in line.matched_debit_ids])
+            payment_lines.extend(filter(None, [rp.credit_move_id.id for rp in line.matched_credit_ids]))
+            payment_lines.extend(filter(None, [rp.debit_move_id.id for rp in line.matched_debit_ids]))
         self.payment_move_line_ids = self.env['account.move.line'].browse(list(set(payment_lines)))
 
     name = fields.Char(string='Reference/Description', index=True,
diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 0b8db4bf796..5cc899b9fad 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -1208,8 +1208,8 @@ class AccountPartialReconcile(models.Model):
     _name = "account.partial.reconcile"
     _description = "Partial Reconcile"
 
-    debit_move_id = fields.Many2one('account.move.line', index=True)
-    credit_move_id = fields.Many2one('account.move.line', index=True)
+    debit_move_id = fields.Many2one('account.move.line', index=True, required=True)
+    credit_move_id = fields.Many2one('account.move.line', index=True, required=True)
     amount = fields.Monetary(currency_field='company_currency_id', help="Amount concerned by this matching. Assumed to be always positive")
     amount_currency = fields.Monetary(string="Amount in Currency")
     currency_id = fields.Many2one('res.currency', string='Currency')