diff --git a/account_usability/account.py b/account_usability/account.py
index 2bf33d0..f4d5a02 100644
--- a/account_usability/account.py
+++ b/account_usability/account.py
@@ -121,7 +121,8 @@ class AccountInvoice(models.Model):
         lines.unlink()
         return True
 
-    def fix_invoice_attachment_filename(self):
+    @api.model
+    def _fix_invoice_attachment_filename(self):
         # This script is designed to fix attachment of invoices
         # badly generated by Odoo v8. I found this problem in Nov 2018 at
         # Encres Dubuit when investigating a bug where Odoo would create a
@@ -240,19 +241,19 @@ class AccountAccount(models.Model):
             return super(AccountAccount, self).name_get()
 
     # https://github.com/odoo/odoo/issues/23040
-    def fix_bank_account_types(self):
-        aao = self.env['account.account']
+    @api.model
+    def _fix_bank_account_types(self):
         companies = self.env['res.company'].search([])
         if len(companies) > 1 and self.env.user.id != SUPERUSER_ID:
-            raise UserError(
-                "In multi-company setups, you should run this "
-                "script as admin user")
+            logger.info(
+                "Multi-company setup detected, running script with sudo ")
+            self = self.sudo()
         logger.info("START the script 'fix bank and cash account types'")
         bank_type = self.env.ref('account.data_account_type_liquidity')
         asset_type = self.env.ref('account.data_account_type_current_assets')
         journals = self.env['account.journal'].search(
             [('type', 'in', ('bank', 'cash'))], order='company_id')
-        journal_accounts_bank_type = aao
+        journal_accounts_bank_type = self
         for journal in journals:
             for account in [
                     journal.default_credit_account_id,
@@ -266,7 +267,7 @@ class AccountAccount(models.Model):
                             account.company_id.display_name, account.code)
                     if account not in journal_accounts_bank_type:
                         journal_accounts_bank_type += account
-        accounts = aao.search([
+        accounts = self.search([
             ('user_type_id', '=', bank_type.id)], order='company_id, code')
         for account in accounts:
             if account not in journal_accounts_bank_type:
@@ -278,7 +279,7 @@ class AccountAccount(models.Model):
         return True
 
     @api.model
-    def create_account_groups(self, level=2, name_prefix=u'Comptes '):
+    def _create_account_groups(self, level=2, name_prefix=u'Comptes '):
         '''Should be launched by a script. Make sure the account_group module is installed
         (the account_usability module doesn't depend on it currently'''
         assert level >= 1
diff --git a/base_usability/users.py b/base_usability/users.py
index 2621d05..49d96ac 100644
--- a/base_usability/users.py
+++ b/base_usability/users.py
@@ -25,7 +25,7 @@ class ResUsers(models.Model):
     @api.model
     def _script_partners_linked_to_users_no_company(self):
         if self.env.user.id != SUPERUSER_ID:
-            raise UserError(_('You must run this script as admin user'))
+            self = self.sudo()
         logger.info(
             'START to set company_id=False on partners related to users')
         users = self.search(