diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 4d7eaae350f..763e6aaf28a 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -2319,7 +2319,7 @@ class AccountMove(models.Model):
                 raise UserError(_('You cannot overwrite the values ensuring the inalterability of the accounting.'))
             if (move.posted_before and 'journal_id' in vals and move.journal_id.id != vals['journal_id']):
                 raise UserError(_('You cannot edit the journal of an account move if it has been posted once.'))
-            if (move.name and move.name != '/' and 'journal_id' in vals and move.journal_id.id != vals['journal_id']):
+            if (move.name and move.name != '/' and move.sequence_number not in (0, 1) and 'journal_id' in vals and move.journal_id.id != vals['journal_id']):
                 raise UserError(_('You cannot edit the journal of an account move if it already has a sequence number assigned.'))
 
             # You can't change the date of a move being inside a locked period.
diff --git a/addons/account/tests/test_sequence_mixin.py b/addons/account/tests/test_sequence_mixin.py
index a42d1381811..714706e47ff 100644
--- a/addons/account/tests/test_sequence_mixin.py
+++ b/addons/account/tests/test_sequence_mixin.py
@@ -7,6 +7,7 @@ from odoo.exceptions import ValidationError, UserError
 from odoo.tools import mute_logger
 
 from dateutil.relativedelta import relativedelta
+from freezegun import freeze_time
 from functools import reduce
 import json
 import psycopg2
@@ -474,3 +475,17 @@ class TestSequenceMixinDeletion(TestSequenceMixinCommon):
         all_moves.button_draft()
         with self.assertRaises(UserError):
             all_moves.unlink()
+
+    @freeze_time('2021-10-01 00:00:00')
+    def test_change_journal_on_first_account_move(self):
+        """Changing the journal on the first move is allowed"""
+        journal = self.env['account.journal'].create({
+            'name': 'awesome journal',
+            'type': 'general',
+            'code': 'AJ',
+        })
+        move = self.env['account.move'].create({})
+        self.assertEqual(move.name, 'MISC/2021/10/0001')
+        with Form(move) as move_form:
+            move_form.journal_id = journal
+        self.assertEqual(move.name, 'AJ/2021/10/0001')