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 1874527d82a..ba125500604 100644
--- a/addons/web/static/src/js/views/form_relational_widgets.js
+++ b/addons/web/static/src/js/views/form_relational_widgets.js
@@ -1109,24 +1109,6 @@ var One2ManyList = AddAnItemList.extend({
     },
 });
 
-var One2ManyFormView = FormView.extend({
-    form_template: 'One2Many.formview',
-    load_form: function(data) {
-        this._super(data);
-        var self = this;
-        this.$buttons.find('button.oe_form_button_create').click(function() {
-            self.save().done(self.on_button_new);
-        });
-    },
-    do_notify_change: function() {
-        if (this.dataset.parent_view) {
-            this.dataset.parent_view.do_notify_change();
-        } else {
-            this._super.apply(this, arguments);
-        }
-    }
-});
-
 var One2ManyViewManager = ViewManager.extend({
     init: function(parent, dataset, views, flags) {
         // By default, render buttons and pager in O2M fields, but no sidebar
@@ -1141,8 +1123,7 @@ var One2ManyViewManager = ViewManager.extend({
         this.set_cp_bus(this.control_panel.get_bus());
         this._super(parent, dataset, views, flags);
         this.registry = core.view_registry.extend({
-            list: One2ManyListView,
-            form: One2ManyFormView,
+            'list': One2ManyListView
         });
         this.__ignore_blur = false;
     },
@@ -1150,36 +1131,6 @@ var One2ManyViewManager = ViewManager.extend({
         this.control_panel.prependTo(this.$el);
         return this._super();
     },
-    switch_mode: function(mode, unused) {
-        if (mode !== 'form') {
-            return this._super(mode, unused);
-        }
-        var self = this;
-        var id = self.o2m.dataset.index !== null ? self.o2m.dataset.ids[self.o2m.dataset.index] : null;
-        var pop = new common.FormOpenPopup(this);
-        pop.show_element(self.o2m.field.relation, id, self.o2m.build_context(), {
-            title: _t("Open: ") + self.o2m.string,
-            create_function: function(data, options) {
-                return self.o2m.data_create(data, options);
-            },
-            write_function: function(id, data, options) {
-                return self.o2m.data_update(id, data, {}).done(function() {
-                    self.o2m.reload_current_view();
-                });
-            },
-            alternative_form_view: self.o2m.field.views ? self.o2m.field.views.form : undefined,
-            parent_view: self.o2m.view,
-            child_name: self.o2m.name,
-            read_function: function(ids, fields, options) {
-                return self.o2m.data_read(ids, fields, options);
-            },
-            form_view_options: {'not_interactible_on_create':true},
-            readonly: self.o2m.get("effective_readonly")
-        });
-        pop.on("elements_selected", self, function() {
-            self.o2m.reload_current_view();
-        });
-    },
 });
 
 var FieldMany2ManyTags = AbstractManyField.extend(common.CompletionFieldMixin, common.ReinitializeFieldMixin, {
diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index 18a34bcb87e..89c87d0b8df 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -1570,11 +1570,6 @@
     </a>
 </t>
 
-<t t-name="One2Many.formview" t-extend="FormView">
-    <t t-jquery=".oe_form_buttons" t-operation="inner">
-        <button type="button" class="oe_button oe_form_button_create">Add</button>
-    </t>
-</t>
 <t t-name="One2Many.listview" t-extend="ListView">
     <t t-jquery="thead > tr:first">
         this.removeAttr('t-if');