diff --git a/addons/account/models/account_account.py b/addons/account/models/account_account.py
index 7c54a743afd..d9262817a8d 100644
--- a/addons/account/models/account_account.py
+++ b/addons/account/models/account_account.py
@@ -61,7 +61,7 @@ class AccountAccount(models.Model):
     name = fields.Char(string="Account Name", required=True, index='trigram', tracking=True)
     currency_id = fields.Many2one('res.currency', string='Account Currency',
         help="Forces all moves for this account to have this account currency.", tracking=True)
-    code = fields.Char(size=64, required=True, index=True, tracking=True)
+    code = fields.Char(size=64, required=True, tracking=True)
     deprecated = fields.Boolean(default=False, tracking=True)
     used = fields.Boolean(compute='_compute_used', search='_search_used')
     user_type_id = fields.Many2one('account.account.type', string='Type', required=True, tracking=True,
diff --git a/addons/account/models/account_journal.py b/addons/account/models/account_journal.py
index 07e2f7d8e47..cdd2965b3b8 100644
--- a/addons/account/models/account_journal.py
+++ b/addons/account/models/account_journal.py
@@ -205,7 +205,7 @@ class AccountJournal(models.Model):
     )
 
     _sql_constraints = [
-        ('code_company_uniq', 'unique (code, company_id)', 'Journal codes must be unique per company.'),
+        ('code_company_uniq', 'unique (company_id, code)', 'Journal codes must be unique per company.'),
     ]
 
     @api.depends('outbound_payment_method_line_ids', 'inbound_payment_method_line_ids')
diff --git a/addons/hr/models/hr_employee.py b/addons/hr/models/hr_employee.py
index 3aad764368b..c18bd91e5ac 100644
--- a/addons/hr/models/hr_employee.py
+++ b/addons/hr/models/hr_employee.py
@@ -33,7 +33,7 @@ class HrEmployeePrivate(models.Model):
     # resource and user
     # required on the resource, make sure required="True" set in the view
     name = fields.Char(string="Employee Name", related='resource_id.name', store=True, readonly=False, tracking=True)
-    user_id = fields.Many2one('res.users', 'User', related='resource_id.user_id', store=True, readonly=False, index=True)
+    user_id = fields.Many2one('res.users', 'User', related='resource_id.user_id', store=True, readonly=False)
     user_partner_id = fields.Many2one(related='user_id.partner_id', related_sudo=False, string="User's partner")
     active = fields.Boolean('Active', related='resource_id.active', default=True, store=True, readonly=False)
     company_id = fields.Many2one('res.company', required=True)
diff --git a/addons/phone_validation/models/phone_blacklist.py b/addons/phone_validation/models/phone_blacklist.py
index 025069687f3..2d40e5ad73c 100644
--- a/addons/phone_validation/models/phone_blacklist.py
+++ b/addons/phone_validation/models/phone_blacklist.py
@@ -17,7 +17,7 @@ class PhoneBlackList(models.Model):
     _description = 'Phone Blacklist'
     _rec_name = 'number'
 
-    number = fields.Char(string='Phone Number', required=True, index=True, tracking=True, help='Number should be E164 formatted')
+    number = fields.Char(string='Phone Number', required=True, tracking=True, help='Number should be E164 formatted')
     active = fields.Boolean(default=True, tracking=True)
 
     _sql_constraints = [
diff --git a/addons/stock/models/stock_orderpoint.py b/addons/stock/models/stock_orderpoint.py
index d3b5f3baf6d..4e628ac8d9c 100644
--- a/addons/stock/models/stock_orderpoint.py
+++ b/addons/stock/models/stock_orderpoint.py
@@ -62,7 +62,7 @@ class StockWarehouseOrderpoint(models.Model):
         ondelete="cascade", required=True, check_company=True)
     product_tmpl_id = fields.Many2one('product.template', related='product_id.product_tmpl_id')
     product_id = fields.Many2one(
-        'product.product', 'Product', index=True,
+        'product.product', 'Product',
         domain=lambda self: self._domain_product_id(),
         ondelete='cascade', required=True, check_company=True)
     product_category_id = fields.Many2one('product.category', name='Product Category', related='product_id.categ_id', store=True)