diff --git a/js/ui/grid_core/ui.grid_core.editing.js b/js/ui/grid_core/ui.grid_core.editing.js
index 8e6c1abc6893..d31afedf81e2 100644
--- a/js/ui/grid_core/ui.grid_core.editing.js
+++ b/js/ui/grid_core/ui.grid_core.editing.js
@@ -1308,12 +1308,12 @@ const EditingController = modules.ViewController.inherit((function() {
             const dataController = this._dataController;
             const item = dataController.items()[rowIndex];
             const key = item && item.key;
-            const editIndex = getIndexByKey(key, this._editData);
             const oldEditRowIndex = this._getVisibleEditRowIndex();
             const isBatchMode = this.option('editing.mode') === EDIT_MODE_BATCH;
 
             this.refresh();
 
+            const editIndex = getIndexByKey(key, this._editData);
             if(editIndex >= 0) {
                 if(this._editData[editIndex].type === DATA_EDIT_DATA_INSERT_TYPE) {
                     this._removeEditDataItem(editIndex);
diff --git a/testing/tests/DevExpress.ui.widgets.dataGrid/editing.tests.js b/testing/tests/DevExpress.ui.widgets.dataGrid/editing.tests.js
index 210f0f89ac21..252459707450 100644
--- a/testing/tests/DevExpress.ui.widgets.dataGrid/editing.tests.js
+++ b/testing/tests/DevExpress.ui.widgets.dataGrid/editing.tests.js
@@ -5036,6 +5036,34 @@ QUnit.test('deleteRow should works if cell value is changed', function(assert) {
     assert.strictEqual(testElement.find('input').length, 0, 'no editors');
 });
 
+QUnit.test('deleteRow should works in row editing mode if boolean column and validation are exist (T865833, T864931)', function(assert) {
+    // arrange
+    const that = this;
+    const rowsView = this.rowsView;
+    const testElement = $('#container');
+
+    that.options.editing = {
+        mode: 'row',
+        allowDeleting: true
+    };
+
+    that.options.columns.push({ dataField: 'booleanField', dataType: 'boolean', validationRules: [{ type: 'required' }] });
+    that.columnsController.reset();
+    that.editingController.init();
+
+    rowsView.render(testElement);
+
+    // assert
+    assert.strictEqual(testElement.find('.dx-data-row').length, 7, 'row count');
+
+    // act
+    that.deleteRow(1);
+    that.clock.tick();
+
+    // assert
+    assert.strictEqual(testElement.find('.dx-data-row').length, 6, 'row is removed');
+});
+
 // T804894
 QUnit.test('addRow should not work if updating is started with validation error', function(assert) {
     // arrange