diff --git a/addons/purchase_requisition/models/purchase_requisition.py b/addons/purchase_requisition/models/purchase_requisition.py
index 084d1a713fc..1cc6d96d8a3 100644
--- a/addons/purchase_requisition/models/purchase_requisition.py
+++ b/addons/purchase_requisition/models/purchase_requisition.py
@@ -107,7 +107,7 @@ class PurchaseRequisition(models.Model):
         # try to set all associated quotations to cancel state
         for requisition in self:
             for requisition_line in requisition.line_ids:
-                requisition_line.supplier_info_ids.unlink()
+                requisition_line.supplier_info_ids.sudo().unlink()
             requisition.purchase_ids.button_cancel()
             for po in requisition.purchase_ids:
                 po.message_post(body=_('Cancelled by the agreement associated to this quotation.'))
@@ -147,7 +147,7 @@ class PurchaseRequisition(models.Model):
             raise UserError(_('You have to cancel or validate every RfQ before closing the purchase requisition.'))
         for requisition in self:
             for requisition_line in requisition.line_ids:
-                requisition_line.supplier_info_ids.unlink()
+                requisition_line.supplier_info_ids.sudo().unlink()
         self.write({'state': 'done'})
 
     @api.ondelete(at_uninstall=False)
@@ -217,7 +217,7 @@ class PurchaseRequisitionLine(models.Model):
         purchase_requisition = self.requisition_id
         if purchase_requisition.type_id.quantity_copy == 'none' and purchase_requisition.vendor_id:
             # create a supplier_info only in case of blanket order
-            self.env['product.supplierinfo'].create({
+            self.env['product.supplierinfo'].sudo().create({
                 'partner_id': purchase_requisition.vendor_id.id,
                 'product_id': self.product_id.id,
                 'product_tmpl_id': self.product_id.product_tmpl_id.id,