macOS VM stops launching after a number of run cycles

**Describe the issue**
After launching and shutting down a macOS virtual machines several times, it becomes impossible to launch it any further until the system is rebooted due to the error `No value exists in nvram for the provided key. The maximum supported number of active virtual machines has been reached.` shown in the attached screenshot. Logging the user out and back in, or rebooting the Mac resolves the issue, however it will reoccur after some time.

**Configuration**
* UTM Version: 3.2.4 (58)
* OS Version: 12.5 (21G72)
* Architecture: Apple Silicon

**Crash log**
There does not appear to be any crash or system log entries for this issue.

**Debug log**
There does not appear to be a debug log option available, presumable due to the VM configured ro macOS virtualisation rather than QEMU.

**Upload VM**
[config.plist](https://github.com/utmapp/UTM/files/9237865/config.plist.txt)