Support native JSON data type of Oracle Database 21c by lwasylow · Pull Request #1181 · utPLSQL/utPLSQL

Can you also add a comment to the documentation related to the fact that DB upgrade will require utPLSQL to be re-installed?

If you're on say 18c and go to 21c, utPLSQL new features (native JSON) will not work without reinstall.
This is because we create a local stub type for JSON on lower versions of oracle.
The same rule applies for upgrade to 12.2, where JSON was initially introduced (JSON_Element_T).

A note on the upgrade of DB with utPLSQL will definitely help.