When using an excel sheet auxiliary file along with your reusable object, some defined parameters are list of values, and may not be edited manually, or accidentally.
The
parameters in Spreadsheet Excel file, if preceded by an asterisk (*) is
pre-locked.
The parameters Spreadsheet Excel file, if preceded by two asterisks (**) is
read only
https://docs.sw.siemens.com/en-US/product/209349590/doc/PL20200605195244930.reuselib/html/id1458140
Stephane Despas