In an RPI3, If you have Raspbian, you can change to the Debian repos and upgrade to experimental where ZM 1.32.2 is. I haven't done an upgrade from Raspbian, but export the DB and reimport it in, and it "should work". I do know that a fresh install works.
Instructions can be found in
https://wiki.zoneminder.com/Raspbian
Raspbian has only I think 1.30.0 ZM in the repo, while Debian has 1.30.4 in its stable repos. So if you are unsure about the process, it might be best to wait until 1.32+ is in the stable repos of Raspbian / Debian.