diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index ae3080b3b8e..2d2a5d5ea4d 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -46,7 +46,7 @@ var M2ODialog = Dialog.extend({
                 click: function () {
                     if (this.$("input").val() !== ''){
                         this.trigger_up('quick_create', { value: this.$('input').val() });
-                        this.close();
+                        this.close(true);
                     } else {
                         this.$("input").focus();
                     }
@@ -71,12 +71,30 @@ var M2ODialog = Dialog.extend({
         this.$("p").text(_.str.sprintf(_t("You are creating a new %s, are you sure it does not exist yet?"), this.name));
         this.$("input").val(this.value);
     },
+    /**
+     * @override
+     * @param {boolean} isSet
+     */
+    close: function (isSet) {
+        this.isSet = isSet;
+        this._super.apply(this, arguments);
+    },
+    /**
+     * @override
+     */
+    destroy: function () {
+        if (!this.isSet) {
+            this.trigger_up('closed_unset');
+        }
+        this._super.apply(this, arguments);
+    },
 });
 
 var FieldMany2One = AbstractField.extend({
     supportedFieldTypes: ['many2one'],
     template: 'FieldMany2One',
     custom_events: _.extend({}, AbstractField.prototype.custom_events, {
+        'closed_unset': '_onDialogClosedUnset',
         'quick_create': '_onQuickCreate',
         'search_create_popup': '_onSearchCreatePopup',
     }),
@@ -451,6 +469,16 @@ var FieldMany2One = AbstractField.extend({
                 });
         }
     },
+
+    /**
+     * Reset the input as dialog has been closed without m2o creation.
+     *
+     * @private
+     */
+    _onDialogClosedUnset: function () {
+        this.floating = false;
+        this._render();
+    },
     /**
      * @private
      */
diff --git a/addons/web/static/tests/fields/relational_fields_tests.js b/addons/web/static/tests/fields/relational_fields_tests.js
index fe98eaaeab2..f665fa160e4 100644
--- a/addons/web/static/tests/fields/relational_fields_tests.js
+++ b/addons/web/static/tests/fields/relational_fields_tests.js
@@ -1397,7 +1397,7 @@ QUnit.module('relational_fields', {
     });
 
     QUnit.test('slow create on a many2one', function (assert) {
-        assert.expect(1);
+        assert.expect(7);
 
         var form = createView({
             View: FormView,
@@ -1417,12 +1417,34 @@ QUnit.module('relational_fields', {
             },
         });
 
+        // cancel the many2one creation with Cancel button
+        form.$('.o_field_many2one input').focus().val('new product').trigger('keyup').trigger('blur');
+        assert.strictEqual($('.modal').length, 1, "there should be one opened modal");
+        $('.modal .modal-footer .btn:contains(Cancel)').click();
+        assert.strictEqual(form.$('.o_field_many2one input').val(), "",
+            'the many2one should not set a value as its creation has been cancelled (with Cancel button)');
+
+        // cancel the many2one creation with Close button
+        form.$('.o_field_many2one input').focus().val('new product').trigger('keyup').trigger('blur');
+        $('.modal .modal-header button').click();
+        assert.strictEqual(form.$('.o_field_many2one input').val(), "",
+            'the many2one should not set a value as its creation has been cancelled (with Close button)');
+
+        // select a new value then cancel the creation of the new one --> restore the previous
+        form.$('.o_field_many2one input').click();
+        form.$('.o_field_many2one input').autocomplete('widget').find('a').first().click();
+        assert.strictEqual(form.$('input').val(), "xphone", "should have selected xphone");
+        form.$('.o_field_many2one input').focus().val('new product').trigger('keyup').trigger('blur');
+        assert.strictEqual($('.modal').length, 1, "there should be one opened modal");
+        $('.modal .modal-footer .btn:contains(Cancel)').click();
+        assert.strictEqual(form.$('.o_field_many2one input').val(), "xphone",
+            'should have restored the many2one with its previous selected value (xphone)');
+
+        // confirm the many2one creation
         form.$('.o_field_many2one input').focus();
-        form.$('.o_field_many2one input').val('new partner').trigger('keyup').trigger('focusout');
-
-        $('.modal .modal-footer .btn-primary').first().click();
-
-        assert.strictEqual($('.modal:visible:last .o_form_view').length, 1,
+        form.$('.o_field_many2one input').val('new partner').trigger('keyup').trigger('blur');
+        $('.modal .modal-footer .btn-primary').click();
+        assert.strictEqual($('.modal .o_form_view').length, 1,
             'a new modal should be opened and contain a form view');
 
         form.destroy();
diff --git a/addons/website_crm_partner_assign/models/crm_lead.py b/addons/website_crm_partner_assign/models/crm_lead.py
index b73be955c42..ce914a5fc4d 100644
--- a/addons/website_crm_partner_assign/models/crm_lead.py
+++ b/addons/website_crm_partner_assign/models/crm_lead.py
@@ -267,7 +267,7 @@ class CrmLead(models.Model):
             'name': values['title'],
             'description': values['description'],
             'priority': '2',
-            'partner_assigned_id': user.partner_id.id,
+            'partner_assigned_id': user.commercial_partner_id.id,
         }
         if tag_own:
             values['tag_ids'] = [(4, tag_own.id, False)]