diff --git a/addons/web/static/src/js/views/form_relational_widgets.js b/addons/web/static/src/js/views/form_relational_widgets.js
index 6a6c258f8f9..2517b3c57b8 100644
--- a/addons/web/static/src/js/views/form_relational_widgets.js
+++ b/addons/web/static/src/js/views/form_relational_widgets.js
@@ -959,7 +959,8 @@ var X2ManyListView = ListView.extend({
             field.no_rerender = true;
             current_values[field.name] = field.get('value');
         });
-        var cached_records = _.filter(this.dataset.cache, function(item){return !_.isEmpty(item.values) && !item.to_delete;});
+        var ids = _.map(this.records.records, function (item) { return item.attributes.id; });
+        var cached_records = _.filter(this.dataset.cache, function(item){return _.contains(ids, item.id) && !_.isEmpty(item.values) && !item.to_delete;});
         var valid = _.every(cached_records, function(record){
             _.each(fields, function(field){
                 var value = record.values[field.name];