[FIX] purchase: use a company consistent sequence numbering.

If a RFQ/PO is created with a specific company, its number must
be assigning using the sequence defined for that company with
disregard to current environment company. E.g. This issue can
easily arise when using aliases to create RFQ's.

closes odoo/odoo#63175

X-original-commit: 5de36feffd0347ff28c8fa35818e7bfc2535df4e
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/purchase/models/purchase.py

@@ -201,10 +201,11 @@ class PurchaseOrder(models.Model):
     @api.model
     def create(self, vals):
         if vals.get('name', 'New') == 'New':
+            company_id = vals.get("company_id", self.env.company.id)
             seq_date = None
             if 'date_order' in vals:
                 seq_date = fields.Datetime.context_timestamp(self, fields.Datetime.to_datetime(vals['date_order']))
-            vals['name'] = self.env['ir.sequence'].next_by_code('purchase.order', sequence_date=seq_date) or '/'
+            vals['name'] = self.env['ir.sequence'].with_company(company_id).next_by_code('purchase.order', sequence_date=seq_date) or '/'
         return super(PurchaseOrder, self).create(vals)
 
     @api.ondelete(at_uninstall=False)