diff --git a/odoo/addons/base/models/ir_actions.py b/odoo/addons/base/models/ir_actions.py
index ca3e87d4fa1..35419344907 100644
--- a/odoo/addons/base/models/ir_actions.py
+++ b/odoo/addons/base/models/ir_actions.py
@@ -170,7 +170,6 @@ class IrActionsActWindow(models.Model):
     _description = 'Action Window'
     _table = 'ir_act_window'
     _inherit = 'ir.actions.actions'
-    _sequence = 'ir_actions_id_seq'
     _order = 'name'
 
     @api.constrains('res_model', 'binding_model_id')
@@ -348,7 +347,6 @@ class IrActionsActUrl(models.Model):
     _description = 'Action URL'
     _table = 'ir_act_url'
     _inherit = 'ir.actions.actions'
-    _sequence = 'ir_actions_id_seq'
     _order = 'name'
 
     name = fields.Char(string='Action Name', translate=True)
@@ -386,7 +384,6 @@ class IrActionsServer(models.Model):
     _description = 'Server Actions'
     _table = 'ir_act_server'
     _inherit = 'ir.actions.actions'
-    _sequence = 'ir_actions_id_seq'
     _order = 'sequence,name'
 
     DEFAULT_PYTHON_CODE = """# Available variables:
@@ -675,7 +672,6 @@ class IrActionsServer(models.Model):
 class IrServerObjectLines(models.Model):
     _name = 'ir.server.object.lines'
     _description = 'Server Action value mapping'
-    _sequence = 'ir_actions_id_seq'
 
     server_id = fields.Many2one('ir.actions.server', string='Related Server Action', ondelete='cascade')
     col1 = fields.Many2one('ir.model.fields', string='Field', required=True, ondelete='cascade')
@@ -831,7 +827,6 @@ class IrActionsActClient(models.Model):
     _description = 'Client Action'
     _inherit = 'ir.actions.actions'
     _table = 'ir_act_client'
-    _sequence = 'ir_actions_id_seq'
     _order = 'name'
 
     name = fields.Char(string='Action Name', translate=True)
diff --git a/odoo/addons/base/models/ir_actions_report.py b/odoo/addons/base/models/ir_actions_report.py
index bfe9681e2c9..dedcca3c196 100644
--- a/odoo/addons/base/models/ir_actions_report.py
+++ b/odoo/addons/base/models/ir_actions_report.py
@@ -92,7 +92,6 @@ class IrActionsReport(models.Model):
     _description = 'Report Action'
     _inherit = 'ir.actions.actions'
     _table = 'ir_act_report_xml'
-    _sequence = 'ir_actions_id_seq'
     _order = 'name'
 
     name = fields.Char(translate=True)
diff --git a/odoo/addons/test_new_api/tests/test_new_fields.py b/odoo/addons/test_new_api/tests/test_new_fields.py
index f4ff27b3871..8cb1613bbd2 100644
--- a/odoo/addons/test_new_api/tests/test_new_fields.py
+++ b/odoo/addons/test_new_api/tests/test_new_fields.py
@@ -3402,7 +3402,7 @@ class TestFieldParametersValidation(common.TransactionCase):
 def insert(model, *fnames):
     """ Return the expected query string to INSERT the given columns. """
     columns = sorted(fnames + ('create_uid', 'create_date', 'write_uid', 'write_date'))
-    return 'INSERT INTO "{}" ("id", {}) VALUES (nextval(%s), {}) RETURNING id'.format(
+    return 'INSERT INTO "{}" ({}) VALUES ({}) RETURNING id'.format(
         model._table,
         ", ".join('"{}"'.format(column) for column in columns),
         ", ".join('%s' for column in columns),
diff --git a/odoo/models.py b/odoo/models.py
index fa66eaab6b4..423d1926705 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -506,7 +506,6 @@ class BaseModel(metaclass=MetaModel):
     """
     _table = None               #: SQL table name used by model if :attr:`_auto`
     _table_query = None         #: SQL expression of the table's content (optional)
-    _sequence = None            #: SQL sequence to use for ID field
     _sql_constraints = []       #: SQL constraints [(name, sql_def, message)]
 
     _rec_name = None            #: field to use for labeling records, default: ``name``
@@ -703,7 +702,6 @@ class BaseModel(metaclass=MetaModel):
         """ Initialize base model attributes. """
         cls._description = cls._name
         cls._table = cls._name.replace('.', '_')
-        cls._sequence = None
         cls._log_access = cls._auto
         inherits = {}
         depends = {}
@@ -716,7 +714,6 @@ class BaseModel(metaclass=MetaModel):
                     _logger.warning("The model %s has no _description", cls._name)
                 cls._description = base._description or cls._description
                 cls._table = base._table or cls._table
-                cls._sequence = base._sequence or cls._sequence
                 cls._log_access = getattr(base, '_log_access', cls._log_access)
 
             inherits.update(base._inherits)
@@ -727,7 +724,6 @@ class BaseModel(metaclass=MetaModel):
             for cons in base._sql_constraints:
                 cls._sql_constraints[cons[0]] = cons
 
-        cls._sequence = cls._sequence or (cls._table + '_id_seq')
         cls._sql_constraints = list(cls._sql_constraints.values())
 
         # avoid assigning an empty dict to save memory
@@ -4211,7 +4207,7 @@ Fields:
         for data in data_list:
             # determine column values
             stored = data['stored']
-            columns = [('id', "nextval(%s)", self._sequence)]
+            columns = []
             for name, val in sorted(stored.items()):
                 field = self._fields[name]
                 assert field.store
@@ -4245,6 +4241,9 @@ Fields:
             # batch, to avoid regressions as much as possible.
             #
             # That said, we haven't closed the door completely.
+            if not columns:  # Manage the case where we create empty record
+                columns = [('id', '%s', psycopg2.extensions.AsIs('DEFAULT'))]
+
             query = "INSERT INTO {} ({}) VALUES ({}) RETURNING id".format(
                 quote(self._table),
                 ", ".join(quote(name) for name, fmt, val in columns),