Some AP's are old, so they cannot be migrated from ZD to VSZ. And in a building where, on the third floor there is an AP with VSZ, users are reporting instability in the connection. I found that these users are taking over the controller, sometimes taking VSZ on the same floor, sometimes opening a session on the ZD, of the AP on the second floor. My boss asked me to return all APs to the ZD, but I am not able to downgrade the firmware, a message appears that something is not enabled and the ZD with the new firmware does not recognize the AP.
