[AccessD] Excel warning on save

I am getting a spreadsheet in an old format.  In order to get it to a
version that will link into Access, I renamed the sheet inside and saved.
It pops up a warning about "was in 2.x, do you want to save in xxx etc.".  I
would like to avoid that warning (just save it).

Anyone know how to turn off that warning?

Is there any "direct way" to modify it such that it is now a current version
of Excel?

John W. Colby
www.ColbyConsulting.com