In most cases updating DuVoice isn't recommended or required.
However, there are a few reasons as to why we would want to have the DuVoice patch updated.
There is a vulnerability with an included service that is fixed within a newer patch.
If there is a bug affecting the currently installed DuVoice patch.
Updating to a newer DuVoice patch may fix said bug.
If it doesn't fix said bug, then updating the software will give our developers the current code base they need, so DuVoice support can share the issue with them, thus the issue can be addressed.
In this case, there will need to be another update done on the DuVoice server, once the newer patch with the bug fix is released.