diff --git a/addons/website_sale_comparison/static/src/js/website_sale_comparison.js b/addons/website_sale_comparison/static/src/js/website_sale_comparison.js
index 0e467206a73..46a7683a60b 100644
--- a/addons/website_sale_comparison/static/src/js/website_sale_comparison.js
+++ b/addons/website_sale_comparison/static/src/js/website_sale_comparison.js
@@ -195,8 +195,12 @@ var ProductComparison = publicWidget.Widget.extend(VariantMixin, {
         var self = this;
         this.$('.o_comparelist_products .o_product_row').remove();
         _.each(this.comparelist_product_ids, function (res) {
-            var $template = self.product_data[res].render;
-            self.$('.o_comparelist_products').append($template);
+            if (self.product_data.hasOwnProperty(res)) {
+                // It is possible that we do not have the required product_data for all IDs in
+                // comparelist_product_ids
+                var $template = self.product_data[res].render;
+                self.$('.o_comparelist_products').append($template);
+            }
         });
         if (force !== 'hide' && (this.comparelist_product_ids.length > 1 || force === 'show')) {
             $('#comparelist .o_product_panel_header').popover('show');
diff --git a/doc/cla/individual/AndrewChau.md b/doc/cla/individual/AndrewChau.md
new file mode 100644
index 00000000000..19414c0c802
--- /dev/null
+++ b/doc/cla/individual/AndrewChau.md
@@ -0,0 +1,11 @@
+Australia, 2022-01-15
+
+I hereby agree to the terms of the Odoo Individual Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+Andrew Chau ky@andrewchau.com https://github.com/AndrewChau