diff --git a/addons/account/models/sequence_mixin.py b/addons/account/models/sequence_mixin.py
index 66d56ba6bb9..cebe3a130c0 100644
--- a/addons/account/models/sequence_mixin.py
+++ b/addons/account/models/sequence_mixin.py
@@ -20,8 +20,8 @@ class SequenceMixin(models.AbstractModel):
     _sequence_field = "name"
     _sequence_date_field = "date"
     _sequence_index = False
-    _sequence_monthly_regex = r'^(?P<prefix1>.*?)(?P<year>(\d{4}|(\d{2}(?=\D))))(?P<prefix2>\D*?)(?P<month>\d{2})(?P<prefix3>\D+?)(?P<seq>\d*)(?P<suffix>\D*?)$'
-    _sequence_yearly_regex = r'^(?P<prefix1>.*?)(?P<year>(\d{4}|\d{2}))(?P<prefix2>\D+?)(?P<seq>\d*)(?P<suffix>\D*?)$'
+    _sequence_monthly_regex = r'^(?P<prefix1>.*?)(?P<year>((?<=\D)|(?<=^))(\d{4}|(\d{2}(?=\D))))(?P<prefix2>\D*?)(?P<month>\d{2})(?P<prefix3>\D+?)(?P<seq>\d*)(?P<suffix>\D*?)$'
+    _sequence_yearly_regex = r'^(?P<prefix1>.*?)(?P<year>((?<=\D)|(?<=^))(\d{4}|\d{2}))(?P<prefix2>\D+?)(?P<seq>\d*)(?P<suffix>\D*?)$'
     _sequence_fixed_regex = r'^(?P<prefix1>.*?)(?P<seq>\d{0,9})(?P<suffix>\D*?)$'
 
     sequence_prefix = fields.Char(compute='_compute_split_sequence', store=True)
diff --git a/addons/account/tests/test_account_move_entry.py b/addons/account/tests/test_account_move_entry.py
index 708ac22415a..6b78445e442 100644
--- a/addons/account/tests/test_account_move_entry.py
+++ b/addons/account/tests/test_account_move_entry.py
@@ -416,6 +416,7 @@ class TestAccountMove(AccountTestInvoicingCommon):
             ('201603-10', '201603-11', '201604-01', '201703-01'),
             ('16-03-10', '16-03-11', '16-04-01', '17-03-01'),
             ('2016-10', '2016-11', '2016-12', '2017-01'),
+            ('045-001-000002', '045-001-000003', '045-001-000004', '045-001-000005'),
             ('JRNL/2016/00001suffix', 'JRNL/2016/00002suffix', 'JRNL/2016/00003suffix', 'JRNL/2017/00001suffix'),
         ]
         other_moves = self.env['account.move'].search([('journal_id', '=', self.test_move.journal_id.id)]) - self.test_move