CA Spectrum 10.2 will not allow for direct upgrades from 9.2.3 due to conversions needed. You will have 3 options:
1. Install 9.4.0 on top and then install 10.2 (or if using new hardware, use the migrate steps to move your SSdb to a new machine, then install 9.4.0 on top of the SSdb and then install 10.2).
2. If you only want to keep your models you can install 10.2 on a new server and load your models only from 9.2.3.
3. Install 10.2 and use modeling gateway to export/import your models from 9.2.3 into 10.2.
10.2 is expected to release by the end of the year.
Hope that helps.
Jay