diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index ab23a2678c9..79da861439b 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -1037,16 +1037,16 @@ class AccountMove(models.Model):
     @api.depends('posted_before', 'state', 'highest_name')
     def _compute_name(self):
         for record in self.sorted(lambda m: (m.date, m.ref or '', m.id)):
+            if record.name and not record.posted_before:
+                # Never been posted, but had a name set
+                record.name = '/'
             if not record.name or record.name == '/':
-                if record.state == 'draft' and not record.posted_before and not record.highest_name:
+                if not record.posted_before and not record.highest_name:
                     # First name of the period for the journal, no name yet
                     record._set_next_sequence()
                 elif record.state == 'posted':
                     # No name yet but has been posted
                     record._set_next_sequence()
-            if record.name and record.state == 'draft' and not record.posted_before and record.highest_name:
-                # Not the first name of the period for the journal, but had a name set
-                record.name = '/'
             record.name = record.name or '/'
 
     @api.depends('journal_id', 'date')
diff --git a/addons/account/tests/test_account_move_entry.py b/addons/account/tests/test_account_move_entry.py
index 554ad39fec1..61bbd3dee9e 100644
--- a/addons/account/tests/test_account_move_entry.py
+++ b/addons/account/tests/test_account_move_entry.py
@@ -340,6 +340,27 @@ class TestAccountMove(AccountTestInvoicingCommon):
         # You can remove journal items if the related journal entry is still balanced.
         self.test_move.line_ids.unlink()
 
+    def test_sequence_change_date(self):
+        # Check setup
+        self.assertEqual(self.test_move.state, 'draft')
+        self.assertEqual(self.test_move.name, 'MISC/2016/01/0001')
+        self.assertEqual(fields.Date.to_string(self.test_move.date), '2016-01-01')
+
+        # Never posetd, the number must change if we change the date
+        self.test_move.date = '2020-02-02'
+        self.assertEqual(self.test_move.name, 'MISC/2020/02/0001')
+
+        # We don't recompute user's input when posting
+        self.test_move.name = 'MyMISC/2020/0000001'
+        self.test_move.post()
+        self.assertEqual(self.test_move.name, 'MyMISC/2020/0000001')
+
+        # Has been posted, and it doesn't change anymore
+        self.test_move.button_draft()
+        self.test_move.date = '2020-01-02'
+        self.test_move.post()
+        self.assertEqual(self.test_move.name, 'MyMISC/2020/0000001')
+
     def test_journal_sequence(self):
         self.assertEqual(self.test_move.name, 'MISC/2016/01/0001')
         self.test_move.post()