Merge pull request #7548 from marmelab/fix-duplicate-key-error

Fix duplicate key error in `DatagridRow`

Author: WiXSL

packages/ra-ui-materialui/src/list/datagrid/DatagridBody.tsx

@@ -45,7 +45,7 @@ const DatagridBody: FC<DatagridBodyProps> = React.forwardRef(
                         hasBulkActions: hasBulkActions && !!selectedIds,
                         hover,
                         id: record.id,
-                        key: record.id,
+                        key: record.id ?? `row${rowIndex}`,
                         onToggleItem,
                         record,
                         resource,