If you ever want to remove an existing Tables table from a spreadsheet, you can do so with the "Remove" command. This command also works for individual cells that are linked to the project information.
The "Remove" command deletes the Revit/Tables links in a spreadsheet
To do so, select the cell to which the project information is linked, or a cell within your table, then click the "Remove" command. After that you can create a new table with Tables.