Release :
Component : View
View 14.0 can be reverted to View 12.1 (as well as 12.2).
See the documentation for Revert View.
The View systems can be upgraded in stages, as View is downward-compatible regarding the database levels.
The 14.0 code level can be implemented at this time, and the 12.1-level databases will work as expected.
A SARDBASE VERSION 14.0 should eventually be run on the databases, to bring the database levels up to the code level.