[Bug]: newest beta version 2.0 beta 1 putting entire Homebridge in boot/crash/restart loop.  
### What happened?

the previous beta, 1.1.56 or something like that, was actually okay.

the issue that's getting raised is that while registering new accessories, or updating during startup, it throws an error saying a particular serial number is already registered... seems to always happen on my flood cam pro 2, always the 2nd of the two, or... one of the 6 motion sensors...  

unfortunately, it was taking down the entire homebridge installation, so other plugins were shutting down and restarting in this loop.

I couldn't leave the plugin installed - I uninstalled, reinstalled, refreshed the devices, did the login procedure again... but as this was taking down everything, I had to uninstall and leave uninstalled. The previous beta is not available to (re)install, so I'm a bit stuck in providing better and more info.




### Device Type

Floodlight (Supported)

### Plugin Version

beta (Best Effort)

### HomeBridge Version

v1.4.x (Supported)

### NodeJS Version

v16 (Supported)

### Operating System

Docker (UnSupported)

### Relevant log output

```shell
[5/1/2022, 3:16:18 PM] [EufySecurity] Updating accessory: Exterior West
[5/1/2022, 3:16:19 PM] DuplicateDeviceError: Device with this serial XXXXXXXXXXXXXXX exists already and couldn't be added again!
    at EufySecurity.addDevice (/homebridge/node_modules/homebridge-eufy-security/node_modules/eufy-security-client/src/eufysecurity.ts:285:19)
    at EufySecurity.handleDevices (/homebridge/node_modules/homebridge-eufy-security/node_modules/eufy-security-client/src/eufysecurity.ts:491:22)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
[5/1/2022, 3:16:19 PM] Got SIGTERM, shutting down Homebridge...
[5/1/2022, 3:16:19 PM] [EufySecurity] Finished shutdown!
[5/1/2022, 3:16:19 PM] Got SIGTERM, shutting down child bridge process...
[5/1/2022, 3:16:19 PM] Got SIGTERM, shutting down child bridge process...
```
