From 03e0455e755670bf7332fe692b4e7ec68cbf3b92 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Fri, 14 Jul 2023 12:01:05 +0200
Subject: [PATCH] Do not allow overpayment of invoice when write-off amount is
 negative

When paying less than the amount to pay, there is no overpayment.
---
 modules/account_invoice/invoice.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/modules/account_invoice/invoice.py b/modules/account_invoice/invoice.py
index 1affedd46d..2a99154b1c 100644
--- a/modules/account_invoice/invoice.py
+++ b/modules/account_invoice/invoice.py
@@ -3157,7 +3157,12 @@ class PayInvoiceAsk(ModelView):
             ('writeoff', "Write-Off"),
             ('partial', "Partial Payment"),
             ('overpayment', "Overpayment"),
-            ], 'Type', required=True)
+            ], 'Type', required=True,
+        domain=[
+            If(Eval('amount_writeoff', 0) >= 0,
+                ('type', 'in', ['writeoff', 'partial']),
+                ()),
+            ])
     writeoff = fields.Many2One(
         'account.move.reconcile.write_off', "Write Off",
         domain=[