diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index ed511de6d56..f29e7913489 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -12,7 +12,7 @@ from odoo import api, fields, models, _
 from odoo.osv import expression
 from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT, format_amount, format_date, formatLang, get_lang, groupby
 from odoo.tools.float_utils import float_compare, float_is_zero, float_round
-from odoo.exceptions import AccessError, UserError, ValidationError
+from odoo.exceptions import UserError, ValidationError
 
 
 class PurchaseOrder(models.Model):
@@ -492,7 +492,7 @@ class PurchaseOrder(models.Model):
         return {
             'partner_id': partner.id,
             'sequence': max(line.product_id.seller_ids.mapped('sequence')) + 1 if line.product_id.seller_ids else 1,
-            'min_qty': 0.0,
+            'min_qty': 1.0,
             'price': price,
             'currency_id': currency.id,
             'delay': 0,
@@ -528,10 +528,8 @@ class PurchaseOrder(models.Model):
                 vals = {
                     'seller_ids': [(0, 0, supplierinfo)],
                 }
-                try:
-                    line.product_id.write(vals)
-                except AccessError:  # no write access rights -> just ignore
-                    break
+                # supplier info should be added regardless of the user access rights
+                line.product_id.sudo().write(vals)
 
     def action_create_invoice(self):
         """Create the invoice associated to the PO.
diff --git a/addons/purchase/tests/test_purchase_invoice.py b/addons/purchase/tests/test_purchase_invoice.py
index eabfdbdf23f..e3fbb8ccd39 100644
--- a/addons/purchase/tests/test_purchase_invoice.py
+++ b/addons/purchase/tests/test_purchase_invoice.py
@@ -327,71 +327,3 @@ class TestPurchaseToInvoice(AccountTestInvoicingCommon):
 
         aml = self.env['account.move.line'].search([('purchase_line_id', '=', purchase_order.order_line.id)])
         self.assertRecordValues(aml, [{'analytic_account_id': analytic_account_manual.id}])
-
-    def test_multicompany_partner_bank(self):
-        """ Test that in a multiple company environment, the bank account of the invoice
-            is the one corresponding to the active company. """
-        company_a = self.env.user.company_id
-        company_b = self.env['res.company'].create({
-            'name': 'Company B',
-        })
-        self.env.ref('l10n_generic_coa.configurable_chart_template')._load(company_b)
-
-        partner = self.env['res.partner'].create({
-            'name': 'AAAAA',
-        })
-        partner_bank_a = self.env['res.partner.bank'].create({
-            'acc_number': "BE01 23456789 10",
-            'partner_id': partner.id,
-            'acc_type': 'bank'
-        })
-        partner_bank_b = self.env['res.partner.bank'].create({
-            'acc_number': "BE10 98765432 10",
-            'partner_id': partner.id,
-            'acc_type': 'bank'
-        })
-        partner.bank_ids = [partner_bank_a.id, partner_bank_b.id]
-        partner_bank_a.company_id = company_a
-        partner_bank_b.company_id = company_b
-
-        PurchaseOrder = self.env['purchase.order'].with_context(tracking_disable=True)
-        po_a = PurchaseOrder.with_company(company_a).create({
-            'partner_id': partner.id,
-            'company_id': company_a.id,
-            'currency_id': company_a.currency_id.id,
-            'date_order': '2019-01-01',
-        })
-        po_b = PurchaseOrder.with_company(company_b).create({
-            'partner_id': partner.id,
-            'company_id': company_b.id,
-            'currency_id': company_b.currency_id.id,
-            'date_order': '2019-01-01',
-        })
-
-        vals_pol = {
-            'name': self.product_deliver.name,
-            'product_id': self.product_deliver.id,
-            'product_qty': 10.0,
-            'product_uom': self.product_deliver.uom_id.id,
-            'price_unit': self.product_deliver.list_price,
-            'order_id': po_a.id,
-            'taxes_id': False,
-        }
-        PurchaseOrderLine = self.env['purchase.order.line'].with_context(tracking_disable=True)
-        PurchaseOrderLine.create(vals_pol)
-        vals_pol['order_id'] = po_b.id
-        PurchaseOrderLine.create(vals_pol)
-
-        po_a.button_confirm()
-        po_b.button_confirm()
-
-        po_a.order_line.qty_received = po_b.order_line.qty_received = 10
-
-        po_a.with_company(company_a).action_create_invoice()
-        po_b.with_company(company_b).action_create_invoice()
-
-        self.assertEqual(po_a.invoice_ids.company_id, company_a)
-        self.assertEqual(po_a.invoice_ids.partner_bank_id, partner_bank_a)
-
-        self.assertEqual(po_b.invoice_ids.company_id, company_b)
-        self.assertEqual(po_b.invoice_ids.partner_bank_id, partner_bank_b)
diff --git a/addons/purchase_stock/tests/test_purchase_order.py b/addons/purchase_stock/tests/test_purchase_order.py
index cfa518d5d59..51003ef98b7 100644
--- a/addons/purchase_stock/tests/test_purchase_order.py
+++ b/addons/purchase_stock/tests/test_purchase_order.py
@@ -370,19 +370,14 @@ class TestPurchaseOrder(ValuationReconciliationTestCommon):
         self.assertEqual(po.order_line.mapped('qty_received'), [4.0], 'Purchase: no conversion error on receipt in different uom"')
 
     def test_message_qty_already_received(self):
-        _product = self.env['product.product'].create({
-            'name': 'TempProduct',
-            'type': 'consu',
-            'company_id': self.env.user.company_id.id,
-        })
+        self.env.user.write({'company_id': self.company_data['company'].id})
 
         _purchase_order = self.env['purchase.order'].create({
-            'company_id': self.env.user.company_id.id,
             'partner_id': self.partner_a.id,
             'order_line': [
                 (0, 0, {
-                    'name': _product.name,
-                    'product_id': _product.id,
+                    'name': self.product_id_2.name,
+                    'product_id': self.product_id_2.id,
                     'product_qty': 25.0,
                     'price_unit': 250.0,
                 })],