I want to upgrade my zone 11.3.1 to ZCM 11.3.1 FRU1.
I have 4 satellites and 2 primaries and 1 DB.

First shutdown the second primary and then install the update on the first primary. Do I need to shutdown the satellite too when going to install the update?

Is ZCM 11.3.1 FRU1 a good client version? Any issues?
The main thing I want to upgrade for is the bug "Bundles with boot schedule randomly fail to install/launch"