Delete the device from SambaPOS local settings. Device settings is stored locally not in the Database. Reinstalling SambaPOS will not replace these settings.
Lets take this step by step.
1st remove the device from local settings > Devices
If this does not work then go to C:\ProgramData\SambaPOS\SambaPOS4 and delete your SambaSettings.txt and the comet device txt file it created then restart SambaPOS.
ProgramData is hidden by default so enable show hidden folders.