Some shapes, such as cell comments, form controls, and OLE objects, are positioned outside the row and column limits of the ...

Some shapes, such as cell comments, form controls, and OLE objects, are positioned outside the row and column limits of the selected file format and will be deleted immediately from the active workbook when saving. You must save a copy of this file in the current file format before saving to the selected file format to avoid losing these shapes.  Do you want to continue?