[FIX] account: keep the sequence consistent if canceled

Steps to reproduce:
```
        | Step | Move | Action      | Date       | Name           |
        | ---- | ---- | ----------- | ---------- | -----------    |
        | 1    | `A`  | Add         | 2023-02-01 | `2023/02/0001` |
        | 2    | `B`  | Add         | 2023-02-02 | `/`            |
        | 3    | `B`  | Post        | 2023-02-02 | `2023/02/0002` |
        | 4    | `A`  | Cancel      | 2023-02-01 | `2023/02/0003` | -> Wrong
```

Issue:
The first invoice should keep its sequence to 1

opw-3757022

closes odoo#158665

X-original-commit: 4b5b616
Signed-off-by: Yolann Sabaux (yosa) <yosa@odoo.com>
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/account_move.py

@@ -755,6 +755,9 @@ def _compute_name(self):
         self = self.sorted(lambda m: (m.date, m.ref or '', m._origin.id))
 
         for move in self:
+            if move.state == 'cancel':
+                continue
+
             move_has_name = move.name and move.name != '/'
             if move_has_name or move.state != 'posted':
                 if not move.posted_before and not move._sequence_matches_date():

addons/account/tests/test_sequence_mixin.py

@@ -226,6 +226,26 @@ def test_sequence_draft_change_date(self):
             self.assertEqual(new_multiple_move_1.name, 'AJ/2016/01/0001')
             move_form.date = fields.Date.to_date('2016-01-10')
 
+    def test_sequence_draft_first_of_period(self):
+        """
+        | Step | Move | Action      | Date       | Name           |
+        | ---- | ---- | ----------- | ---------- | -----------    |
+        | 1    | `A`  | Add         | 2023-02-01 | `2023/02/0001` |
+        | 2    | `B`  | Add         | 2023-02-02 | `/`            |
+        | 3    | `B`  | Post        | 2023-02-02 | `2023/02/0002` |
+        | 4    | `A`  | Cancel      | 2023-02-01 | `2023/02/0001` | -> Assert
+        """
+        move_a = self.test_move.copy({'date': '2023-02-01'})
+        self.assertEqual(move_a.name, 'MISC/2023/02/0001')
+
+        move_b = self.test_move.copy({'date': '2023-02-02'})
+        self.assertEqual(move_b.name, '/')
+
+        move_b.action_post()
+        self.assertEqual(move_b.name, 'MISC/2023/02/0002')
+
+        move_a.button_cancel()
+        self.assertEqual(move_a.name, 'MISC/2023/02/0001')
 
     def test_journal_sequence(self):
         self.assertEqual(self.test_move.name, 'MISC/2016/01/0001')