diff --git a/packages/amis-core/src/store/table2.ts b/packages/amis-core/src/store/table2.ts
index 2464b0174..d4aa5c959 100644
--- a/packages/amis-core/src/store/table2.ts
+++ b/packages/amis-core/src/store/table2.ts
@@ -442,7 +442,7 @@ export const TableStore2 = ServiceStore.named('TableStore2')
     function exchange(fromIndex: number, toIndex: number, item?: IRow2) {
       item = item || self.rows[fromIndex];
 
-      if (item.parentId) {
+      if (item?.parentId) {
         const parent: IRow2 = self.getRowById(item.parentId) as any;
         const offset = parent.children.indexOf(item) - fromIndex;
         toIndex += offset;
diff --git a/packages/amis/src/renderers/Table2/index.tsx b/packages/amis/src/renderers/Table2/index.tsx
index 81c9a72c6..14c7bda22 100644
--- a/packages/amis/src/renderers/Table2/index.tsx
+++ b/packages/amis/src/renderers/Table2/index.tsx
@@ -1591,11 +1591,13 @@ export default class Table2 extends React.Component<Table2Props, object> {
       if (rowClassNameExpr) {
         classnames.push(filter(rowClassNameExpr, {record, rowIndex}));
       }
+      // row可能不存在
+      // 比如初始化给了10条数据，异步接口又替换成4条
       const row = store.getRowByIndex(rowIndex);
-      if (row.modified) {
+      if (row?.modified) {
         classnames.push('is-modified');
       }
-      if (row.moved) {
+      if (row?.moved) {
         classnames.push('is-moved');
       }
       return classnames.join(' ');