https://github.com/syncfusion/flutter-widgets/blob/28788acdf5e1e76fe82783c16efb87bae589a4e6/packages/syncfusion_flutter_xlsio/lib/src/xlsio/worksheet/worksheet.dart#L1581 `rows[i] = rows[i + 1];` change to `rows.innerList[i - 1] = rows.innerList[i];` fix it