diff --git a/account_invoice_constraint_chronology/model/account_move.py b/account_invoice_constraint_chronology/model/account_move.py
index 56135830..c95dfdcb 100644
--- a/account_invoice_constraint_chronology/model/account_move.py
+++ b/account_invoice_constraint_chronology/model/account_move.py
@@ -94,7 +94,7 @@ class AccountMove(models.Model):
     def write(self, vals):
         if vals.get("state") != "posted":
             return super().write(vals)
-
+        previously_validated = self.filtered(lambda m: m.name and m.name != "/")
         newly_posted = self.filtered(lambda move: move.state != "posted")
         res = super().write(vals)
         for move in newly_posted & self.filtered("journal_id.check_chronology"):
@@ -104,6 +104,8 @@ class AccountMove(models.Model):
                 move._raise_sequence_ordering_conflict()
             if self.search(move._get_older_conflicting_invoices_domain(), limit=1):
                 move._raise_older_conflicting_invoices()
+            if move in previously_validated:
+                continue
             if self.search(move._get_newer_conflicting_invoices_domain(), limit=1):
                 move._raise_newer_conflicting_invoices()
 
diff --git a/account_invoice_constraint_chronology/tests/test_account_invoice_constraint_chronology.py b/account_invoice_constraint_chronology/tests/test_account_invoice_constraint_chronology.py
index 499355c1..024c1a65 100644
--- a/account_invoice_constraint_chronology/tests/test_account_invoice_constraint_chronology.py
+++ b/account_invoice_constraint_chronology/tests/test_account_invoice_constraint_chronology.py
@@ -133,3 +133,19 @@ class TestAccountInvoiceConstraintChronology(common.SavepointCase):
         self.invoice_1.invoice_date = self.tomorrow
         with self.assertRaisesRegex(UserError, "higher number"):
             self.invoice_1.action_post()
+
+    def test_modify_validated_past_invoice(self):
+        """We've got an invoice from yesterday that we need to modify but new ones
+        have been posted since. As the invoice already has a name, we should be able
+        to validate it"""
+        self.invoice_1.invoice_date = self.yesterday
+        self.invoice_1.action_post()
+        self.invoice_2.invoice_date = self.today
+        self.invoice_2.action_post()
+        self.invoice_1.button_cancel()
+        self.invoice_1.button_draft()
+        self.invoice_1.action_post()
+        self.invoice_1_5 = self.invoice_1.copy()
+        self.invoice_1_5.invoice_date = self.yesterday
+        with self.assertRaises(UserError):
+            self.invoice_1_5.action_post()