diff --git a/addons/website_sale/models/res_partner.py b/addons/website_sale/models/res_partner.py
index eec0e04d6bc86..9fd913f478ef8 100644
--- a/addons/website_sale/models/res_partner.py
+++ b/addons/website_sale/models/res_partner.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import api, fields, models
+from odoo import api, fields, models, _
 from odoo.addons.website.models import ir_http
 
 
@@ -18,8 +18,29 @@ def _compute_last_website_so_id(self):
             if website and not is_public:
                 partner.last_website_so_id = SaleOrder.search([
                     ('partner_id', '=', partner.id),
+                    ('pricelist_id', '=', partner.property_product_pricelist.id),
                     ('website_id', '=', website.id),
                     ('state', '=', 'draft'),
                 ], order='write_date desc', limit=1)
             else:
                 partner.last_website_so_id = SaleOrder  # Not in a website context or public User
+
+    @api.onchange('property_product_pricelist')
+    def _onchange_property_product_pricelist(self):
+        open_order = self.env['sale.order'].search([
+            ('partner_id', '=', self._origin.id),
+            ('pricelist_id', '=', self._origin.property_product_pricelist.id),
+            ('pricelist_id', '!=', self.property_product_pricelist.id),
+            ('website_id', '!=', False),
+            ('state', '=', 'draft'),
+        ], limit=1)
+
+        if open_order:
+            return {'warning': {
+                'title': _('Open Sale Orders'),
+                'message': _(
+                    "This partner has an open cart. "
+                    "Please note that the pricelist will not be updated on that cart. "
+                    "Also, the cart might not be visible for the customer until you update the pricelist of that cart."
+                ),
+            }}