With SPSS 29, IBM introduced the IBM ID as a way to license an instance of SPSS. Currently, UConn Anyware uses an ITS-managed license server to license SPSS.
When you launch SPSS 29 for the first time in your Anyware session, you will see the option to log in with an IBM ID or Apply Existing License. Choose Apply Existing License, and that will let you progress. You will not be asked that question again unless your UConn Anyware profile is reset.